1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0 2 VERSION = 6 !! 2 VERSION = 4 3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 16 4 SUBLEVEL = 5 !! 4 SUBLEVEL = 18 5 EXTRAVERSION = 5 EXTRAVERSION = 6 NAME = Baby Opossum Posse !! 6 NAME = Fearless Coyote 7 7 8 # *DOCUMENTATION* 8 # *DOCUMENTATION* 9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help" 10 # More info can be located in ./README 10 # More info can be located in ./README 11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not 12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file. 13 13 14 ifeq ($(filter output-sync,$(.FEATURES)),) !! 14 # That's our default target when none is given on the command line 15 $(error GNU Make >= 4.0 is required. Your Make !! 15 PHONY := _all 16 endif !! 16 _all: 17 17 18 $(if $(filter __%, $(MAKECMDGOALS)), \ !! 18 # o Do not use make's built-in rules and variables 19 $(error targets prefixed with '__' are !! 19 # (this increases performance and avoids hard-to-debug behaviour); >> 20 # o Look for make include files relative to root of kernel src >> 21 MAKEFLAGS += -rR --include-dir=$(CURDIR) 20 22 21 # That's our default target when none is given !! 23 # Avoid funny character set dependencies 22 PHONY := __all !! 24 unexport LC_ALL 23 __all: !! 25 LC_COLLATE=C >> 26 LC_NUMERIC=C >> 27 export LC_COLLATE LC_NUMERIC >> 28 >> 29 # Avoid interference with shell env settings >> 30 unexport GREP_OPTIONS 24 31 25 # We are using a recursive build, so we need t 32 # We are using a recursive build, so we need to do a little thinking 26 # to get the ordering right. 33 # to get the ordering right. 27 # 34 # 28 # Most importantly: sub-Makefiles should only 35 # Most importantly: sub-Makefiles should only ever modify files in 29 # their own directory. If in some directory we 36 # their own directory. If in some directory we have a dependency on 30 # a file in another dir (which doesn't happen 37 # a file in another dir (which doesn't happen often, but it's often 31 # unavoidable when linking the built-in.a targ !! 38 # unavoidable when linking the built-in.o targets which finally 32 # turn into vmlinux), we will call a sub make 39 # turn into vmlinux), we will call a sub make in that other dir, and 33 # after that we are sure that everything which 40 # after that we are sure that everything which is in that other dir 34 # is now up to date. 41 # is now up to date. 35 # 42 # 36 # The only cases where we need to modify files 43 # The only cases where we need to modify files which have global 37 # effects are thus separated out and done befo 44 # effects are thus separated out and done before the recursive 38 # descending is started. They are now explicit 45 # descending is started. They are now explicitly listed as the 39 # prepare rule. 46 # prepare rule. 40 47 41 this-makefile := $(lastword $(MAKEFILE_LIST)) << 42 abs_srctree := $(realpath $(dir $(this-makefil << 43 abs_objtree := $(CURDIR) << 44 << 45 ifneq ($(sub_make_done),1) << 46 << 47 # Do not use make's built-in rules and variabl << 48 # (this increases performance and avoids hard- << 49 MAKEFLAGS += -rR << 50 << 51 # Avoid funny character set dependencies << 52 unexport LC_ALL << 53 LC_COLLATE=C << 54 LC_NUMERIC=C << 55 export LC_COLLATE LC_NUMERIC << 56 << 57 # Avoid interference with shell env settings << 58 unexport GREP_OPTIONS << 59 << 60 # Beautify output 48 # Beautify output 61 # -------------------------------------------- 49 # --------------------------------------------------------------------------- 62 # 50 # 63 # Most of build commands in Kbuild start with !! 51 # Normally, we echo the whole command before executing it. By making 64 # "quiet_cmd_*". If defined, the short log is !! 52 # that echo $($(quiet)$(cmd)), we now have the possibility to set 65 # that command is printed by default. !! 53 # $(quiet) to choose other forms of output instead, e.g. 66 # !! 54 # 67 # e.g.) !! 55 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 56 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 69 # cmd_depmod = $(srctree)/scripts/dep !! 57 # >> 58 # If $(quiet) is empty, the whole command will be printed. >> 59 # If it is set to "quiet_", only the short version will be printed. >> 60 # If it is set to "silent_", nothing will be printed at all, since >> 61 # the variable $(silent_cmd_cc_o_c) doesn't exist. 70 # 62 # 71 # A simple variant is to prefix commands with 63 # A simple variant is to prefix commands with $(Q) - that's useful 72 # for commands that shall be hidden in non-ver 64 # for commands that shall be hidden in non-verbose mode. 73 # 65 # 74 # $(Q)$(MAKE) $(build)=scripts/basic !! 66 # $(Q)ln $@ :< 75 # 67 # 76 # If KBUILD_VERBOSE contains 1, the whole comm !! 68 # If KBUILD_VERBOSE equals 0 then the above command will be hidden. 77 # If KBUILD_VERBOSE contains 2, the reason for !! 69 # If KBUILD_VERBOSE equals 1 then the above command is displayed. 78 # 70 # 79 # To put more focus on warnings, be less verbo 71 # To put more focus on warnings, be less verbose as default 80 # Use 'make V=1' to see the full commands 72 # Use 'make V=1' to see the full commands 81 73 82 ifeq ("$(origin V)", "command line") 74 ifeq ("$(origin V)", "command line") 83 KBUILD_VERBOSE = $(V) 75 KBUILD_VERBOSE = $(V) 84 endif 76 endif >> 77 ifndef KBUILD_VERBOSE >> 78 KBUILD_VERBOSE = 0 >> 79 endif 85 80 86 quiet = quiet_ !! 81 ifeq ($(KBUILD_VERBOSE),1) 87 Q = @ << 88 << 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) << 90 quiet = 82 quiet = 91 Q = 83 Q = >> 84 else >> 85 quiet=quiet_ >> 86 Q = @ 92 endif 87 endif 93 88 94 # If the user is running make -s (silent mode) 89 # If the user is running make -s (silent mode), suppress echoing of 95 # commands 90 # commands 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 91 97 quiet=silent_ !! 92 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98 override KBUILD_VERBOSE := !! 93 quiet=silent_ >> 94 tools_silent=s 99 endif 95 endif 100 96 101 export quiet Q KBUILD_VERBOSE 97 export quiet Q KBUILD_VERBOSE 102 98 103 # Call a source code checker (by default, "spa !! 99 # kbuild supports saving output files in a separate directory. 104 # C compilation. !! 100 # To locate output files in a separate directory two syntaxes are supported. >> 101 # In both cases the working directory must be the root of the kernel src. >> 102 # 1) O= >> 103 # Use "make O=dir/to/store/output/files/" 105 # 104 # 106 # Use 'make C=1' to enable checking of only re !! 105 # 2) Set KBUILD_OUTPUT 107 # Use 'make C=2' to enable checking of *all* s !! 106 # Set the environment variable KBUILD_OUTPUT to point to the directory 108 # of whether they are re-compiled or not. !! 107 # where the output files shall be placed. >> 108 # export KBUILD_OUTPUT=dir/to/store/output/files/ >> 109 # make 109 # 110 # 110 # See the file "Documentation/dev-tools/sparse !! 111 # The O= assignment takes precedence over the KBUILD_OUTPUT environment 111 # including where to get the "sparse" utility. !! 112 # variable. 112 << 113 ifeq ("$(origin C)", "command line") << 114 KBUILD_CHECKSRC = $(C) << 115 endif << 116 ifndef KBUILD_CHECKSRC << 117 KBUILD_CHECKSRC = 0 << 118 endif << 119 113 120 export KBUILD_CHECKSRC !! 114 # KBUILD_SRC is not intended to be used by the regular user (for now), >> 115 # it is set on invocation of make with KBUILD_OUTPUT or O= specified. >> 116 ifeq ($(KBUILD_SRC),) 121 117 122 # Enable "clippy" (a linter) as part of the Ru !! 118 # OK, Make called in directory where kernel src resides 123 # !! 119 # Do we want to locate output files in a separate directory? 124 # Use 'make CLIPPY=1' to enable it. !! 120 ifeq ("$(origin O)", "command line") 125 ifeq ("$(origin CLIPPY)", "command line") !! 121 KBUILD_OUTPUT := $(O) 126 KBUILD_CLIPPY := $(CLIPPY) << 127 endif 122 endif 128 123 129 export KBUILD_CLIPPY !! 124 # Cancel implicit rules on top Makefile >> 125 $(CURDIR)/Makefile Makefile: ; 130 126 131 # Use make M=dir or set the environment variab !! 127 ifneq ($(words $(subst :, ,$(CURDIR))), 1) 132 # directory of external module to build. Setti !! 128 $(error main directory cannot contain spaces nor colons) 133 ifeq ("$(origin M)", "command line") << 134 KBUILD_EXTMOD := $(M) << 135 endif 129 endif 136 130 137 $(if $(word 2, $(KBUILD_EXTMOD)), \ !! 131 ifneq ($(KBUILD_OUTPUT),) 138 $(error building multiple external mod !! 132 # check that the output directory actually exists >> 133 saved-output := $(KBUILD_OUTPUT) >> 134 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ >> 135 && pwd) >> 136 $(if $(KBUILD_OUTPUT),, \ >> 137 $(error failed to create output directory "$(saved-output)")) 139 138 140 $(foreach x, % :, $(if $(findstring $x, $(KBUI !! 139 PHONY += $(MAKECMDGOALS) sub-make 141 $(error module directory path cannot c << 142 140 143 # Remove trailing slashes !! 141 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) !! 142 @: 145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM << 146 endif << 147 143 148 export KBUILD_EXTMOD !! 144 # Invoke a second make in the output directory, passing relevant variables >> 145 sub-make: >> 146 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ >> 147 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 149 148 150 # backward compatibility !! 149 # Leave processing to above invocation of make 151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC !! 150 skip-makefile := 1 >> 151 endif # ifneq ($(KBUILD_OUTPUT),) >> 152 endif # ifeq ($(KBUILD_SRC),) 152 153 153 ifeq ("$(origin W)", "command line") !! 154 # We process the rest of the Makefile if this is the final invocation of make 154 KBUILD_EXTRA_WARN := $(W) !! 155 ifeq ($(skip-makefile),) 155 endif << 156 156 157 export KBUILD_EXTRA_WARN !! 157 # Do not print "Entering directory ...", >> 158 # but we want to display it when entering to the output directory >> 159 # so that IDEs/editors are able to understand relative filenames. >> 160 MAKEFLAGS += --no-print-directory 158 161 159 # Kbuild will save output files in the current !! 162 # Call a source code checker (by default, "sparse") as part of the 160 # This does not need to match to the root of t !! 163 # C compilation. 161 # << 162 # For example, you can do this: << 163 # << 164 # cd /dir/to/store/output/files; make -f /dir << 165 # << 166 # If you want to save output files in a differ << 167 # two syntaxes to specify it. << 168 # << 169 # 1) O= << 170 # Use "make O=dir/to/store/output/files/" << 171 # 164 # 172 # 2) Set KBUILD_OUTPUT !! 165 # Use 'make C=1' to enable checking of only re-compiled files. 173 # Set the environment variable KBUILD_OUTPUT t !! 166 # Use 'make C=2' to enable checking of *all* source files, regardless 174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 167 # of whether they are re-compiled or not. 175 # 168 # 176 # The O= assignment takes precedence over the !! 169 # See the file "Documentation/dev-tools/sparse.rst" for more details, 177 # variable. !! 170 # including where to get the "sparse" utility. 178 171 179 # Do we want to change the working directory? !! 172 ifeq ("$(origin C)", "command line") 180 ifeq ("$(origin O)", "command line") !! 173 KBUILD_CHECKSRC = $(C) 181 KBUILD_OUTPUT := $(O) << 182 endif 174 endif 183 !! 175 ifndef KBUILD_CHECKSRC 184 ifneq ($(KBUILD_OUTPUT),) !! 176 KBUILD_CHECKSRC = 0 185 # $(realpath ...) gets empty if the path does << 186 $(shell mkdir -p "$(KBUILD_OUTPUT)") << 187 # $(realpath ...) resolves symlinks << 188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) << 189 $(if $(abs_objtree),,$(error failed to create << 190 endif # ifneq ($(KBUILD_OUTPUT),) << 191 << 192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 << 193 $(error source directory cannot contain spaces << 194 endif 177 endif 195 178 196 export sub_make_done := 1 !! 179 # Use make M=dir to specify directory of external module to build 197 !! 180 # Old syntax make ... SUBDIRS=$PWD is still supported 198 endif # sub_make_done !! 181 # Setting the environment variable KBUILD_EXTMOD take precedence 199 !! 182 ifdef SUBDIRS 200 ifeq ($(abs_objtree),$(CURDIR)) !! 183 KBUILD_EXTMOD ?= $(SUBDIRS) 201 # Suppress "Entering directory ..." if we are << 202 no-print-directory := --no-print-directory << 203 else << 204 # Recursion to show "Entering directory ..." << 205 need-sub-make := 1 << 206 endif 184 endif 207 185 208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 186 ifeq ("$(origin M)", "command line") 209 # If --no-print-directory is unset, recurse on !! 187 KBUILD_EXTMOD := $(M) 210 # You may end up recursing into __sub-make twi << 211 # behavior change in GNU Make 4.4.1. << 212 need-sub-make := 1 << 213 endif 188 endif 214 189 215 ifeq ($(need-sub-make),1) !! 190 ifeq ($(KBUILD_SRC),) 216 << 217 PHONY += $(MAKECMDGOALS) __sub-make << 218 << 219 $(filter-out $(this-makefile), $(MAKECMDGOALS) << 220 @: << 221 << 222 # Invoke a second make in the output directory << 223 __sub-make: << 224 $(Q)$(MAKE) $(no-print-directory) -C $ << 225 -f $(abs_srctree)/Makefile $(MAKECMDGO << 226 << 227 else # need-sub-make << 228 << 229 # We process the rest of the Makefile if this << 230 << 231 ifeq ($(abs_srctree),$(abs_objtree)) << 232 # building in the source tree 191 # building in the source tree 233 srctree := . 192 srctree := . 234 building_out_of_srctree := << 235 else 193 else 236 ifeq ($(abs_srctree)/,$(dir $(abs_objt !! 194 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 237 # building in a subdirectory o 195 # building in a subdirectory of the source tree 238 srctree := .. 196 srctree := .. 239 else 197 else 240 srctree := $(abs_srctree) !! 198 srctree := $(KBUILD_SRC) 241 endif 199 endif 242 building_out_of_srctree := 1 << 243 endif 200 endif 244 201 245 ifneq ($(KBUILD_ABS_SRCTREE),) !! 202 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC 246 srctree := $(abs_srctree) << 247 endif << 248 203 249 objtree := . 204 objtree := . >> 205 src := $(srctree) >> 206 obj := $(objtree) 250 207 251 VPATH := !! 208 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 252 209 253 ifeq ($(KBUILD_EXTMOD),) !! 210 export srctree objtree VPATH 254 ifdef building_out_of_srctree << 255 VPATH := $(srctree) << 256 endif << 257 endif << 258 << 259 export building_out_of_srctree srctree objtree << 260 211 261 # To make sure we do not include .config for a 212 # To make sure we do not include .config for any of the *config targets 262 # catch them early, and hand them over to scri 213 # catch them early, and hand them over to scripts/kconfig/Makefile 263 # It is allowed to specify more targets when c 214 # It is allowed to specify more targets when calling make, including 264 # mixing *config targets and build targets. 215 # mixing *config targets and build targets. 265 # For example 'make oldconfig all'. 216 # For example 'make oldconfig all'. 266 # Detect when mixed targets is specified, and 217 # Detect when mixed targets is specified, and make a second invocation 267 # of make so .config is not included in this c 218 # of make so .config is not included in this case either (for *config). 268 219 269 version_h := include/generated/uapi/linux/vers 220 version_h := include/generated/uapi/linux/version.h >> 221 old_version_h := include/linux/version.h 270 222 271 clean-targets := %clean mrproper cleandocs !! 223 no-dot-config-targets := clean mrproper distclean \ 272 no-dot-config-targets := $(clean-targets) \ << 273 cscope gtags TAGS tag 224 cscope gtags TAGS tags help% %docs check% coccicheck \ 274 $(version_h) headers !! 225 $(version_h) headers_% archheaders archscripts \ 275 %asm-generic kernelve !! 226 kernelversion %src-pkg 276 outputmakefile rustav << 277 no-sync-config-targets := $(no-dot-config-targ << 278 image_name << 279 single-targets := %.a %.i %.ko %.lds %.ll %.ls << 280 << 281 config-build := << 282 mixed-build := << 283 need-config := 1 << 284 may-sync-config := 1 << 285 single-build := << 286 << 287 ifneq ($(filter $(no-dot-config-targets), $(MA << 288 ifeq ($(filter-out $(no-dot-config-targets << 289 need-config := << 290 endif << 291 endif << 292 << 293 ifneq ($(filter $(no-sync-config-targets), $(M << 294 ifeq ($(filter-out $(no-sync-config-target << 295 may-sync-config := << 296 endif << 297 endif << 298 227 299 need-compiler := $(may-sync-config) !! 228 config-targets := 0 >> 229 mixed-targets := 0 >> 230 dot-config := 1 300 231 301 ifneq ($(KBUILD_EXTMOD),) !! 232 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 302 may-sync-config := !! 233 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) >> 234 dot-config := 0 >> 235 endif 303 endif 236 endif 304 237 305 ifeq ($(KBUILD_EXTMOD),) 238 ifeq ($(KBUILD_EXTMOD),) 306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 239 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 307 config-build := 1 !! 240 config-targets := 1 308 ifneq ($(words $(MAKECMDGOALS)),1) !! 241 ifneq ($(words $(MAKECMDGOALS)),1) 309 mixed-build := 1 !! 242 mixed-targets := 1 >> 243 endif 310 endif 244 endif 311 endif << 312 endif << 313 << 314 # We cannot build single targets and the other << 315 ifneq ($(filter $(single-targets), $(MAKECMDGO << 316 single-build := 1 << 317 ifneq ($(filter-out $(single-targets), $(M << 318 mixed-build := 1 << 319 endif << 320 endif << 321 << 322 # For "make -j clean all", "make -j mrproper d << 323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL << 324 ifneq ($(filter-out $(clean-targets),$(MAK << 325 mixed-build := 1 << 326 endif << 327 endif 245 endif 328 << 329 # install and modules_install need also be pro 246 # install and modules_install need also be processed one by one 330 ifneq ($(filter install,$(MAKECMDGOALS)),) 247 ifneq ($(filter install,$(MAKECMDGOALS)),) 331 ifneq ($(filter modules_install,$(MAKECMDG !! 248 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 332 mixed-build := 1 !! 249 mixed-targets := 1 333 endif !! 250 endif 334 endif 251 endif 335 252 336 ifdef mixed-build !! 253 ifeq ($(mixed-targets),1) 337 # ============================================ 254 # =========================================================================== 338 # We're called with mixed targets (*config and 255 # We're called with mixed targets (*config and build targets). 339 # Handle them one by one. 256 # Handle them one by one. 340 257 341 PHONY += $(MAKECMDGOALS) __build_one_by_one 258 PHONY += $(MAKECMDGOALS) __build_one_by_one 342 259 343 $(MAKECMDGOALS): __build_one_by_one !! 260 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 344 @: 261 @: 345 262 346 __build_one_by_one: 263 __build_one_by_one: 347 $(Q)set -e; \ 264 $(Q)set -e; \ 348 for i in $(MAKECMDGOALS); do \ 265 for i in $(MAKECMDGOALS); do \ 349 $(MAKE) -f $(srctree)/Makefile 266 $(MAKE) -f $(srctree)/Makefile $$i; \ 350 done 267 done 351 268 352 else # !mixed-build !! 269 else 353 270 354 include $(srctree)/scripts/Kbuild.include !! 271 # We need some generic definitions (do not try to remake the file). >> 272 scripts/Kbuild.include: ; >> 273 include scripts/Kbuild.include 355 274 356 # Read KERNELRELEASE from include/config/kerne 275 # Read KERNELRELEASE from include/config/kernel.release (if it exists) 357 KERNELRELEASE = $(call read-file, include/conf !! 276 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 277 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 278 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 360 279 361 include $(srctree)/scripts/subarch.include !! 280 # SUBARCH tells the usermode build what the underlying arch is. That is set >> 281 # first, and if a usermode build is happening, the "ARCH=um" on the command >> 282 # line overrides the setting of ARCH below. If a native build is happening, >> 283 # then ARCH is assigned, getting whatever value it gets normally, and >> 284 # SUBARCH is subsequently ignored. >> 285 >> 286 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ >> 287 -e s/sun4u/sparc64/ \ >> 288 -e s/arm.*/arm/ -e s/sa110/arm/ \ >> 289 -e s/s390x/s390/ -e s/parisc64/parisc/ \ >> 290 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ >> 291 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ >> 292 -e s/riscv.*/riscv/) 362 293 363 # Cross compiling and selecting different set 294 # Cross compiling and selecting different set of gcc/bin-utils 364 # -------------------------------------------- 295 # --------------------------------------------------------------------------- 365 # 296 # 366 # When performing cross compilation for other 297 # When performing cross compilation for other architectures ARCH shall be set 367 # to the target architecture. (See arch/* for 298 # to the target architecture. (See arch/* for the possibilities). 368 # ARCH can be set during invocation of make: 299 # ARCH can be set during invocation of make: 369 # make ARCH=arm64 !! 300 # make ARCH=ia64 370 # Another way is to have ARCH set in the envir 301 # Another way is to have ARCH set in the environment. 371 # The default ARCH is the host where make is e 302 # The default ARCH is the host where make is executed. 372 303 373 # CROSS_COMPILE specify the prefix used for al 304 # CROSS_COMPILE specify the prefix used for all executables used 374 # during compilation. Only gcc and related bin 305 # during compilation. Only gcc and related bin-utils executables 375 # are prefixed with $(CROSS_COMPILE). 306 # are prefixed with $(CROSS_COMPILE). 376 # CROSS_COMPILE can be set on the command line 307 # CROSS_COMPILE can be set on the command line 377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 308 # make CROSS_COMPILE=ia64-linux- 378 # Alternatively CROSS_COMPILE can be set in th 309 # Alternatively CROSS_COMPILE can be set in the environment. >> 310 # A third alternative is to store a setting in .config so that plain >> 311 # "make" in the configured kernel build directory always uses that. 379 # Default value for CROSS_COMPILE is not to pr 312 # Default value for CROSS_COMPILE is not to prefix executables 380 # Note: Some architectures assign CROSS_COMPIL 313 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 381 ARCH ?= $(SUBARCH) 314 ARCH ?= $(SUBARCH) >> 315 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 382 316 383 # Architecture as present in compile.h 317 # Architecture as present in compile.h 384 UTS_MACHINE := $(ARCH) 318 UTS_MACHINE := $(ARCH) 385 SRCARCH := $(ARCH) 319 SRCARCH := $(ARCH) 386 320 387 # Additional ARCH settings for x86 321 # Additional ARCH settings for x86 388 ifeq ($(ARCH),i386) 322 ifeq ($(ARCH),i386) 389 SRCARCH := x86 323 SRCARCH := x86 390 endif 324 endif 391 ifeq ($(ARCH),x86_64) 325 ifeq ($(ARCH),x86_64) 392 SRCARCH := x86 326 SRCARCH := x86 393 endif 327 endif 394 328 395 # Additional ARCH settings for sparc 329 # Additional ARCH settings for sparc 396 ifeq ($(ARCH),sparc32) 330 ifeq ($(ARCH),sparc32) 397 SRCARCH := sparc 331 SRCARCH := sparc 398 endif 332 endif 399 ifeq ($(ARCH),sparc64) 333 ifeq ($(ARCH),sparc64) 400 SRCARCH := sparc 334 SRCARCH := sparc 401 endif 335 endif 402 336 403 # Additional ARCH settings for parisc !! 337 # Additional ARCH settings for sh 404 ifeq ($(ARCH),parisc64) !! 338 ifeq ($(ARCH),sh64) 405 SRCARCH := parisc !! 339 SRCARCH := sh 406 endif 340 endif 407 341 408 export cross_compiling := !! 342 # Additional ARCH settings for tile 409 ifneq ($(SRCARCH),$(SUBARCH)) !! 343 ifeq ($(ARCH),tilepro) 410 cross_compiling := 1 !! 344 SRCARCH := tile >> 345 endif >> 346 ifeq ($(ARCH),tilegx) >> 347 SRCARCH := tile 411 endif 348 endif 412 349 413 KCONFIG_CONFIG ?= .config 350 KCONFIG_CONFIG ?= .config 414 export KCONFIG_CONFIG 351 export KCONFIG_CONFIG 415 352 416 # SHELL used by kbuild 353 # SHELL used by kbuild 417 CONFIG_SHELL := sh !! 354 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 418 !! 355 else if [ -x /bin/bash ]; then echo /bin/bash; \ 419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS !! 356 else echo sh; fi ; fi) 420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG !! 357 421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d !! 358 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS) 422 !! 359 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS) 423 ifneq ($(LLVM),) !! 360 HOST_LFS_LIBS := $(shell getconf LFS_LIBS) 424 ifneq ($(filter %/,$(LLVM)),) !! 361 425 LLVM_PREFIX := $(LLVM) !! 362 HOSTCC = gcc 426 else ifneq ($(filter -%,$(LLVM)),) !! 363 HOSTCXX = g++ 427 LLVM_SUFFIX := $(LLVM) !! 364 HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 428 endif !! 365 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) 429 !! 366 HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) 430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) !! 367 HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) 431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) !! 368 HOST_LOADLIBES := $(HOST_LFS_LIBS) 432 else << 433 HOSTCC = gcc << 434 HOSTCXX = g++ << 435 endif << 436 HOSTRUSTC = rustc << 437 HOSTPKG_CONFIG = pkg-config << 438 << 439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto << 440 -O2 -fomit-frame-poin << 441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) << 442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) << 443 << 444 # These flags apply to all Rust code in the tr << 445 # host programs. << 446 export rust_common_flags := --edition=2021 \ << 447 -Zbinary_dep_depin << 448 -Astable_features << 449 -Dunsafe_op_in_uns << 450 -Dnon_ascii_idents << 451 -Wrust_2018_idioms << 452 -Wunreachable_pub << 453 -Wmissing_docs \ << 454 -Wrustdoc::missing << 455 -Wclippy::all \ << 456 -Wclippy::mut_mut << 457 -Wclippy::needless << 458 -Wclippy::needless << 459 -Wclippy::no_mangl << 460 -Wclippy::dbg_macr << 461 << 462 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS << 463 $(HOSTCFLAGS) -I $(srct << 464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 465 -I $(srctree)/scripts/i << 466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 467 -Zallow-features= $(HO << 468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(H << 469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST << 470 369 471 # Make variables (CC, etc...) 370 # Make variables (CC, etc...) 472 CPP = $(CC) -E !! 371 AS = $(CROSS_COMPILE)as 473 ifneq ($(LLVM),) << 474 CC = $(LLVM_PREFIX)clang$(LLVM_SU << 475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S << 476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ << 477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ << 478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( << 479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( << 480 READELF = $(LLVM_PREFIX)llvm-readelf$( << 481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL << 482 else << 483 CC = $(CROSS_COMPILE)gcc << 484 LD = $(CROSS_COMPILE)ld 372 LD = $(CROSS_COMPILE)ld >> 373 CC = $(CROSS_COMPILE)gcc >> 374 CPP = $(CC) -E 485 AR = $(CROSS_COMPILE)ar 375 AR = $(CROSS_COMPILE)ar 486 NM = $(CROSS_COMPILE)nm 376 NM = $(CROSS_COMPILE)nm >> 377 STRIP = $(CROSS_COMPILE)strip 487 OBJCOPY = $(CROSS_COMPILE)objcopy 378 OBJCOPY = $(CROSS_COMPILE)objcopy 488 OBJDUMP = $(CROSS_COMPILE)objdump 379 OBJDUMP = $(CROSS_COMPILE)objdump 489 READELF = $(CROSS_COMPILE)readelf << 490 STRIP = $(CROSS_COMPILE)strip << 491 endif << 492 RUSTC = rustc << 493 RUSTDOC = rustdoc << 494 RUSTFMT = rustfmt << 495 CLIPPY_DRIVER = clippy-driver << 496 BINDGEN = bindgen << 497 PAHOLE = pahole << 498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve << 499 LEX = flex 380 LEX = flex 500 YACC = bison 381 YACC = bison 501 AWK = awk 382 AWK = awk >> 383 GENKSYMS = scripts/genksyms/genksyms 502 INSTALLKERNEL := installkernel 384 INSTALLKERNEL := installkernel >> 385 DEPMOD = /sbin/depmod 503 PERL = perl 386 PERL = perl 504 PYTHON3 = python3 !! 387 PYTHON = python 505 CHECK = sparse 388 CHECK = sparse 506 BASH = bash << 507 KGZIP = gzip << 508 KBZIP2 = bzip2 << 509 KLZOP = lzop << 510 LZMA = lzma << 511 LZ4 = lz4c << 512 XZ = xz << 513 ZSTD = zstd << 514 389 515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 390 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 516 -Wbitwise -Wno-return-void - 391 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 517 NOSTDINC_FLAGS := !! 392 NOSTDINC_FLAGS = 518 CFLAGS_MODULE = 393 CFLAGS_MODULE = 519 RUSTFLAGS_MODULE = << 520 AFLAGS_MODULE = 394 AFLAGS_MODULE = 521 LDFLAGS_MODULE = 395 LDFLAGS_MODULE = 522 CFLAGS_KERNEL = 396 CFLAGS_KERNEL = 523 RUSTFLAGS_KERNEL = << 524 AFLAGS_KERNEL = 397 AFLAGS_KERNEL = 525 LDFLAGS_vmlinux = 398 LDFLAGS_vmlinux = 526 399 527 # Use USERINCLUDE when you must reference the 400 # Use USERINCLUDE when you must reference the UAPI directories only. 528 USERINCLUDE := \ 401 USERINCLUDE := \ 529 -I$(srctree)/arch/$(SRCARCH)/i 402 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 530 -I$(objtree)/arch/$(SRCARCH)/i 403 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 531 -I$(srctree)/include/uapi \ 404 -I$(srctree)/include/uapi \ 532 -I$(objtree)/include/generated 405 -I$(objtree)/include/generated/uapi \ 533 -include $(srctree)/include/li << 534 -include $(srctree)/include/li 406 -include $(srctree)/include/linux/kconfig.h 535 407 536 # Use LINUXINCLUDE when you must reference the 408 # Use LINUXINCLUDE when you must reference the include/ directory. 537 # Needed to be compatible with the O= option 409 # Needed to be compatible with the O= option 538 LINUXINCLUDE := \ 410 LINUXINCLUDE := \ 539 -I$(srctree)/arch/$(SRCARCH)/i 411 -I$(srctree)/arch/$(SRCARCH)/include \ 540 -I$(objtree)/arch/$(SRCARCH)/i 412 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 541 $(if $(building_out_of_srctree !! 413 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 542 -I$(objtree)/include \ 414 -I$(objtree)/include \ 543 $(USERINCLUDE) 415 $(USERINCLUDE) 544 416 545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE !! 417 KBUILD_AFLAGS := -D__ASSEMBLY__ 546 !! 418 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 547 KBUILD_CFLAGS := !! 419 -fno-strict-aliasing -fno-common -fshort-wchar \ 548 KBUILD_CFLAGS += -std=gnu11 !! 420 -Werror-implicit-function-declaration \ 549 KBUILD_CFLAGS += -fshort-wchar !! 421 -Wno-format-security \ 550 KBUILD_CFLAGS += -funsigned-char !! 422 -std=gnu89 551 KBUILD_CFLAGS += -fno-common << 552 KBUILD_CFLAGS += -fno-PIE << 553 KBUILD_CFLAGS += -fno-strict-aliasing << 554 << 555 KBUILD_CPPFLAGS := -D__KERNEL__ 423 KBUILD_CPPFLAGS := -D__KERNEL__ 556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ << 557 -Cpanic=abort -Cembed-bitc << 558 -Cforce-unwind-tables=n -C << 559 -Csymbol-mangling-version= << 560 -Crelocation-model=static << 561 -Zfunction-sections=n \ << 562 -Wclippy::float_arithmetic << 563 << 564 KBUILD_AFLAGS_KERNEL := 424 KBUILD_AFLAGS_KERNEL := 565 KBUILD_CFLAGS_KERNEL := 425 KBUILD_CFLAGS_KERNEL := 566 KBUILD_RUSTFLAGS_KERNEL := << 567 KBUILD_AFLAGS_MODULE := -DMODULE 426 KBUILD_AFLAGS_MODULE := -DMODULE 568 KBUILD_CFLAGS_MODULE := -DMODULE 427 KBUILD_CFLAGS_MODULE := -DMODULE 569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE !! 428 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 570 KBUILD_LDFLAGS_MODULE := !! 429 GCC_PLUGINS_CFLAGS := 571 KBUILD_LDFLAGS := << 572 CLANG_FLAGS := << 573 << 574 ifeq ($(KBUILD_CLIPPY),1) << 575 RUSTC_OR_CLIPPY_QUIET := CLIPPY << 576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) << 577 else << 578 RUSTC_OR_CLIPPY_QUIET := RUSTC << 579 RUSTC_OR_CLIPPY = $(RUSTC) << 580 endif << 581 << 582 ifdef RUST_LIB_SRC << 583 export RUST_LIB_SRC << 584 endif << 585 430 586 # Allows the usage of unstable features in sta !! 431 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 587 export RUSTC_BOOTSTRAP := 1 !! 432 export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES >> 433 export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE >> 434 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 588 435 589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K !! 436 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q << 591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS << 592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF << 593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ << 594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD << 595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS << 596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS << 597 << 598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC << 599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 437 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 438 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 439 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 440 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 441 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL >> 442 export KBUILD_ARFLAGS >> 443 >> 444 # When compiling out-of-tree modules, put MODVERDIR in the module >> 445 # tree rather than in the kernel tree. The kernel tree might >> 446 # even be read-only. >> 447 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 604 448 605 # Files to ignore in find ... statements 449 # Files to ignore in find ... statements 606 450 607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 451 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 608 -name CVS -o -name . 452 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 609 -prune -o 453 -prune -o >> 454 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ >> 455 --exclude CVS --exclude .pc --exclude .hg --exclude .git 610 456 611 # ============================================ 457 # =========================================================================== 612 # Rules shared between *config targets and bui 458 # Rules shared between *config targets and build targets 613 459 614 # Basic helpers built in scripts/basic/ 460 # Basic helpers built in scripts/basic/ 615 PHONY += scripts_basic 461 PHONY += scripts_basic 616 scripts_basic: 462 scripts_basic: 617 $(Q)$(MAKE) $(build)=scripts/basic 463 $(Q)$(MAKE) $(build)=scripts/basic >> 464 $(Q)rm -f .tmp_quiet_recordmcount >> 465 >> 466 # To avoid any implicit rule to kick in, define an empty command. >> 467 scripts/basic/%: scripts_basic ; 618 468 619 PHONY += outputmakefile 469 PHONY += outputmakefile 620 ifdef building_out_of_srctree << 621 # Before starting out-of-tree build, make sure << 622 # outputmakefile generates a Makefile in the o 470 # outputmakefile generates a Makefile in the output directory, if using a 623 # separate output directory. This allows conve 471 # separate output directory. This allows convenient use of make in the 624 # output directory. 472 # output directory. 625 # At the same time when output Makefile genera << 626 # ignore whole output directory << 627 << 628 quiet_cmd_makefile = GEN Makefile << 629 cmd_makefile = { \ << 630 echo "\# Automatically generated by $( << 631 echo "include $(srctree)/Makefile"; \ << 632 } > Makefile << 633 << 634 outputmakefile: 473 outputmakefile: 635 @if [ -f $(srctree)/.config -o \ !! 474 ifneq ($(KBUILD_SRC),) 636 -d $(srctree)/include/config << 637 -d $(srctree)/arch/$(SRCARCH) << 638 echo >&2 "***"; \ << 639 echo >&2 "*** The source tree << 640 echo >&2 "*** in $(abs_srctree << 641 echo >&2 "***"; \ << 642 false; \ << 643 fi << 644 $(Q)ln -fsn $(srctree) source 475 $(Q)ln -fsn $(srctree) source 645 $(call cmd,makefile) !! 476 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 646 $(Q)test -e .gitignore || \ !! 477 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 647 { echo "# this is build directory, ign << 648 endif 478 endif 649 479 650 # The expansion should be delayed until arch/$ !! 480 ifeq ($(cc-name),clang) 651 # Some architectures define CROSS_COMPILE in a !! 481 ifneq ($(CROSS_COMPILE),) 652 # CC_VERSION_TEXT is referenced from Kconfig ( !! 482 CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%)) 653 # and from include/config/auto.conf.cmd to det !! 483 GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) 654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC << 655 << 656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), << 657 include $(srctree)/scripts/Makefile.clang << 658 endif 484 endif 659 !! 485 ifneq ($(GCC_TOOLCHAIN),) 660 # Include this also for config targets because !! 486 CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN) 661 # cc-cross-prefix to determine CROSS_COMPILE. !! 487 endif 662 ifdef need-compiler !! 488 KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) 663 include $(srctree)/scripts/Makefile.compiler !! 489 KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) >> 490 KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) >> 491 KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) 664 endif 492 endif 665 493 666 ifdef config-build !! 494 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register >> 495 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk >> 496 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) >> 497 export RETPOLINE_CFLAGS >> 498 >> 499 ifeq ($(config-targets),1) 667 # ============================================ 500 # =========================================================================== 668 # *config targets only - make sure prerequisit 501 # *config targets only - make sure prerequisites are updated, and descend 669 # in scripts/kconfig to make the *config targe 502 # in scripts/kconfig to make the *config target 670 503 671 # Read arch-specific Makefile to set KBUILD_DE !! 504 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 672 # KBUILD_DEFCONFIG may point out an alternativ 505 # KBUILD_DEFCONFIG may point out an alternative default configuration 673 # used for 'make defconfig' 506 # used for 'make defconfig' 674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 507 include arch/$(SRCARCH)/Makefile 675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 508 export KBUILD_DEFCONFIG KBUILD_KCONFIG 676 509 677 config: outputmakefile scripts_basic FORCE !! 510 config: scripts_basic outputmakefile FORCE 678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 511 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 679 512 680 %config: outputmakefile scripts_basic FORCE !! 513 %config: scripts_basic outputmakefile FORCE 681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 514 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 682 515 683 else #!config-build !! 516 else 684 # ============================================ 517 # =========================================================================== 685 # Build targets only - this includes vmlinux, !! 518 # Build targets only - this includes vmlinux, arch specific targets, clean 686 # targets and others. In general all targets e 519 # targets and others. In general all targets except *config targets. 687 520 688 # If building an external module we do not car 521 # If building an external module we do not care about the all: rule 689 # but instead __all depend on modules !! 522 # but instead _all depend on modules 690 PHONY += all 523 PHONY += all 691 ifeq ($(KBUILD_EXTMOD),) 524 ifeq ($(KBUILD_EXTMOD),) 692 __all: all !! 525 _all: all 693 else 526 else 694 __all: modules !! 527 _all: modules 695 endif 528 endif 696 529 697 targets := << 698 << 699 # Decide whether to build built-in, modular, o 530 # Decide whether to build built-in, modular, or both. 700 # Normally, just do built-in. 531 # Normally, just do built-in. 701 532 702 KBUILD_MODULES := 533 KBUILD_MODULES := 703 KBUILD_BUILTIN := 1 534 KBUILD_BUILTIN := 1 704 535 705 # If we have only "make modules", don't compil 536 # If we have only "make modules", don't compile built-in objects. >> 537 # When we're building modules with modversions, we need to consider >> 538 # the built-in objects during the descend as well, in order to >> 539 # make sure the checksums are up to date before we record them. >> 540 706 ifeq ($(MAKECMDGOALS),modules) 541 ifeq ($(MAKECMDGOALS),modules) 707 KBUILD_BUILTIN := !! 542 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 708 endif 543 endif 709 544 710 # If we have "make <whatever> modules", compil 545 # If we have "make <whatever> modules", compile modules 711 # in addition to whatever we do anyway. 546 # in addition to whatever we do anyway. 712 # Just "make" or "make all" shall build module 547 # Just "make" or "make all" shall build modules as well 713 548 714 ifneq ($(filter all modules nsdeps %compile_co !! 549 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 715 KBUILD_MODULES := 1 550 KBUILD_MODULES := 1 716 endif 551 endif 717 552 718 ifeq ($(MAKECMDGOALS),) 553 ifeq ($(MAKECMDGOALS),) 719 KBUILD_MODULES := 1 554 KBUILD_MODULES := 1 720 endif 555 endif 721 556 722 export KBUILD_MODULES KBUILD_BUILTIN 557 export KBUILD_MODULES KBUILD_BUILTIN 723 558 724 ifdef need-config << 725 include include/config/auto.conf << 726 endif << 727 << 728 ifeq ($(KBUILD_EXTMOD),) 559 ifeq ($(KBUILD_EXTMOD),) >> 560 # Additional helpers built in scripts/ >> 561 # Carefully list dependencies so we do not try to build scripts twice >> 562 # in parallel >> 563 PHONY += scripts >> 564 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ >> 565 asm-generic gcc-plugins >> 566 $(Q)$(MAKE) $(build)=$(@) >> 567 729 # Objects we will link into vmlinux / subdirs 568 # Objects we will link into vmlinux / subdirs we need to visit 730 core-y := !! 569 init-y := init/ 731 drivers-y := !! 570 drivers-y := drivers/ sound/ firmware/ >> 571 net-y := net/ 732 libs-y := lib/ 572 libs-y := lib/ >> 573 core-y := usr/ >> 574 virt-y := virt/ 733 endif # KBUILD_EXTMOD 575 endif # KBUILD_EXTMOD 734 576 735 # The all: target is the default when no targe !! 577 ifeq ($(dot-config),1) 736 # command line. !! 578 # Read in config 737 # This allow a user to issue only 'make' to bu !! 579 -include include/config/auto.conf 738 # Defaults to vmlinux, but the arch makefile u << 739 all: vmlinux << 740 << 741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover << 742 ifdef CONFIG_CC_IS_GCC << 743 CFLAGS_GCOV += -fno-tree-loop-im << 744 endif << 745 export CFLAGS_GCOV << 746 << 747 # The arch Makefiles can override CC_FLAGS_FTR << 748 ifdef CONFIG_FUNCTION_TRACER << 749 CC_FLAGS_FTRACE := -pg << 750 endif << 751 580 752 include $(srctree)/arch/$(SRCARCH)/Makefile !! 581 ifeq ($(KBUILD_EXTMOD),) >> 582 # Read in dependencies to all Kconfig* files, make sure to run >> 583 # oldconfig if changes are detected. >> 584 -include include/config/auto.conf.cmd 753 585 754 ifdef need-config !! 586 # To avoid any implicit rule to kick in, define an empty command 755 ifdef may-sync-config !! 587 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 756 # Read in dependencies to all Kconfig* files, << 757 # changes are detected. This should be include << 758 # because some architectures define CROSS_COMP << 759 include include/config/auto.conf.cmd << 760 << 761 $(KCONFIG_CONFIG): << 762 @echo >&2 '***' << 763 @echo >&2 '*** Configuration file "$@" << 764 @echo >&2 '***' << 765 @echo >&2 '*** Please run some configu << 766 @echo >&2 '*** "make menuconfig" or "m << 767 @echo >&2 '***' << 768 @/bin/false << 769 588 770 # The actual configuration files used during t 589 # The actual configuration files used during the build are stored in 771 # include/generated/ and include/config/. Upda 590 # include/generated/ and include/config/. Update them if .config is newer than 772 # include/config/auto.conf (which mirrors .con 591 # include/config/auto.conf (which mirrors .config). 773 # !! 592 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 774 # This exploits the 'multi-target pattern rule !! 593 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 775 # The syncconfig should be executed only once !! 594 else 776 # (Note: use the grouped target '&:' when we b !! 595 # external modules needs include/generated/autoconf.h and include/config/auto.conf 777 # !! 596 # but do not care if they are up-to-date. Use auto.conf to trigger the test 778 # Do not use $(call cmd,...) here. That would << 779 # so you cannot notice that Kconfig is waiting << 780 %/config/auto.conf %/config/auto.conf.cmd %/ge << 781 $(Q)$(kecho) " SYNC $@" << 782 $(Q)$(MAKE) -f $(srctree)/Makefile syn << 783 else # !may-sync-config << 784 # External modules and some install targets ne << 785 # and include/config/auto.conf but do not care << 786 # Use auto.conf to trigger the test << 787 PHONY += include/config/auto.conf 597 PHONY += include/config/auto.conf 788 598 789 include/config/auto.conf: 599 include/config/auto.conf: 790 @test -e include/generated/autoconf.h !! 600 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 791 echo >&2; 601 echo >&2; \ 792 echo >&2 " ERROR: Kernel configuratio 602 echo >&2 " ERROR: Kernel configuration is invalid."; \ 793 echo >&2 " include/generated/a 603 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 794 echo >&2 " Run 'make oldconfig 604 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 795 echo >&2 ; 605 echo >&2 ; \ 796 /bin/false) 606 /bin/false) 797 607 798 endif # may-sync-config !! 608 endif # KBUILD_EXTMOD 799 endif # need-config !! 609 >> 610 else >> 611 # Dummy target needed, because used as prerequisite >> 612 include/config/auto.conf: ; >> 613 endif # $(dot-config) >> 614 >> 615 # For the kernel to actually contain only the needed exported symbols, >> 616 # we have to build modules as well to determine what those symbols are. >> 617 # (this can be evaluated only once include/config/auto.conf has been included) >> 618 ifdef CONFIG_TRIM_UNUSED_KSYMS >> 619 KBUILD_MODULES := 1 >> 620 endif >> 621 >> 622 # The all: target is the default when no target is given on the >> 623 # command line. >> 624 # This allow a user to issue only 'make' to build a kernel including modules >> 625 # Defaults to vmlinux, but the arch makefile usually adds further targets >> 626 all: vmlinux 800 627 801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch !! 628 KBUILD_CFLAGS += $(call cc-option,-fno-PIE) >> 629 KBUILD_AFLAGS += $(call cc-option,-fno-PIE) >> 630 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) >> 631 export CFLAGS_GCOV CFLAGS_KCOV >> 632 >> 633 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default >> 634 # values of the respective KBUILD_* variables >> 635 ARCH_CPPFLAGS := >> 636 ARCH_AFLAGS := >> 637 ARCH_CFLAGS := >> 638 include arch/$(SRCARCH)/Makefile >> 639 >> 640 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) >> 641 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) >> 642 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) >> 643 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) >> 644 KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) >> 645 >> 646 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE >> 647 KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) >> 648 KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) >> 649 else >> 650 ifdef CONFIG_PROFILE_ALL_BRANCHES >> 651 KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) >> 652 else >> 653 KBUILD_CFLAGS += -O2 >> 654 endif >> 655 endif 802 656 803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE !! 657 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 804 KBUILD_CFLAGS += -O2 !! 658 $(call cc-disable-warning,maybe-uninitialized,)) 805 KBUILD_RUSTFLAGS += -Copt-level=2 << 806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE << 807 KBUILD_CFLAGS += -Os << 808 KBUILD_RUSTFLAGS += -Copt-level=s << 809 endif << 810 << 811 # Always set `debug-assertions` and `overflow- << 812 # depends on `opt-level` and `debug-assertions << 813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 815 659 816 # Tell gcc to never replace conditional load w 660 # Tell gcc to never replace conditional load with a non-conditional one 817 ifdef CONFIG_CC_IS_GCC << 818 # gcc-10 renamed --param=allow-store-data-race << 819 # -fno-allow-store-data-races. << 820 KBUILD_CFLAGS += $(call cc-option,--param=al 661 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 821 KBUILD_CFLAGS += $(call cc-option,-fno-allow !! 662 >> 663 # check for 'asm goto' >> 664 ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) >> 665 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO >> 666 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 822 endif 667 endif 823 668 >> 669 include scripts/Makefile.kcov >> 670 include scripts/Makefile.gcc-plugins >> 671 824 ifdef CONFIG_READABLE_ASM 672 ifdef CONFIG_READABLE_ASM 825 # Disable optimizations that make assembler li 673 # Disable optimizations that make assembler listings hard to read. 826 # reorder blocks reorders the control in the f 674 # reorder blocks reorders the control in the function 827 # ipa clone creates specialized cloned functio 675 # ipa clone creates specialized cloned functions 828 # partial inlining inlines only parts of funct 676 # partial inlining inlines only parts of functions 829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 677 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ >> 678 $(call cc-option,-fno-ipa-cp-clone,) \ >> 679 $(call cc-option,-fno-partial-inlining) 830 endif 680 endif 831 681 832 stackp-flags-y !! 682 ifneq ($(CONFIG_FRAME_WARN),0) 833 stackp-flags-$(CONFIG_STACKPROTECTOR) !! 683 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) !! 684 endif 835 685 836 KBUILD_CFLAGS += $(stackp-flags-y) !! 686 # This selects the stack protector compiler flag. Testing it is delayed >> 687 # until after .config has been reprocessed, in the prepare-compiler-check >> 688 # target. >> 689 ifdef CONFIG_CC_STACKPROTECTOR_AUTO >> 690 stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector)) >> 691 stackp-name := AUTO >> 692 else >> 693 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR >> 694 stackp-flag := -fstack-protector >> 695 stackp-name := REGULAR >> 696 else >> 697 ifdef CONFIG_CC_STACKPROTECTOR_STRONG >> 698 stackp-flag := -fstack-protector-strong >> 699 stackp-name := STRONG >> 700 else >> 701 # If either there is no stack protector for this architecture or >> 702 # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name) >> 703 # is empty, skipping all remaining stack protector tests. >> 704 # >> 705 # Force off for distro compilers that enable stack protector by default. >> 706 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) >> 707 endif >> 708 endif >> 709 endif >> 710 # Find arch-specific stack protector compiler sanity-checking script. >> 711 ifdef stackp-name >> 712 ifneq ($(stackp-flag),) >> 713 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh >> 714 stackp-check := $(wildcard $(stackp-path)) >> 715 # If the wildcard test matches a test script, run it to check functionality. >> 716 ifdef stackp-check >> 717 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) >> 718 stackp-broken := y >> 719 endif >> 720 endif >> 721 ifndef stackp-broken >> 722 # If the stack protector is functional, enable code that depends on it. >> 723 KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR >> 724 # Either we've already detected the flag (for AUTO) or we'll fail the >> 725 # build in the prepare-compiler-check rule (for specific flag). >> 726 KBUILD_CFLAGS += $(stackp-flag) >> 727 else >> 728 # We have to make sure stack protector is unconditionally disabled if >> 729 # the compiler is broken (in case we're going to continue the build in >> 730 # AUTO mode). >> 731 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) >> 732 endif >> 733 endif >> 734 endif 837 735 838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 736 ifeq ($(cc-name),clang) 839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 737 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) >> 738 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) >> 739 KBUILD_CFLAGS += $(call cc-disable-warning, gnu) >> 740 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) >> 741 # Quiet clang warning: comparison of unsigned expression < 0 is always false >> 742 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) >> 743 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the >> 744 # source of a reference will be _MergedGlobals and not on of the whitelisted names. >> 745 # See modpost pattern 2 >> 746 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) >> 747 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) >> 748 else >> 749 >> 750 # These warnings generated too much noise in a regular build. >> 751 # Use make W=1 to enable them (see scripts/Makefile.extrawarn) >> 752 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) >> 753 endif 840 754 >> 755 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 841 ifdef CONFIG_FRAME_POINTER 756 ifdef CONFIG_FRAME_POINTER 842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 757 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y << 844 else 758 else 845 # Some targets (ARM with Thumb2, for example), 759 # Some targets (ARM with Thumb2, for example), can't be built with frame 846 # pointers. For those, we don't have FUNCTION 760 # pointers. For those, we don't have FUNCTION_TRACER automatically 847 # select FRAME_POINTER. However, FUNCTION_TRA 761 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 848 # incompatible with -fomit-frame-pointer with 762 # incompatible with -fomit-frame-pointer with current GCC, so we don't use 849 # -fomit-frame-pointer with FUNCTION_TRACER. 763 # -fomit-frame-pointer with FUNCTION_TRACER. 850 # In the Rust target specification, "frame-poi << 851 # to "may-omit". << 852 ifndef CONFIG_FUNCTION_TRACER 764 ifndef CONFIG_FUNCTION_TRACER 853 KBUILD_CFLAGS += -fomit-frame-pointer 765 KBUILD_CFLAGS += -fomit-frame-pointer 854 endif 766 endif 855 endif 767 endif 856 768 857 # Initialize all stack variables with a 0xAA p !! 769 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 858 ifdef CONFIG_INIT_STACK_ALL_PATTERN << 859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat << 860 endif << 861 770 862 # Initialize all stack variables with a zero v !! 771 ifdef CONFIG_DEBUG_INFO 863 ifdef CONFIG_INIT_STACK_ALL_ZERO !! 772 ifdef CONFIG_DEBUG_INFO_SPLIT 864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer !! 773 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 774 else 866 # https://github.com/llvm/llvm-project/issues/ !! 775 KBUILD_CFLAGS += -g 867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi << 868 export CC_AUTO_VAR_INIT_ZERO_ENABLER << 869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA << 870 endif 776 endif >> 777 KBUILD_AFLAGS += -Wa,-gdwarf-2 >> 778 endif >> 779 ifdef CONFIG_DEBUG_INFO_DWARF4 >> 780 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 871 endif 781 endif 872 782 873 # While VLAs have been removed, GCC produces u !! 783 ifdef CONFIG_DEBUG_INFO_REDUCED 874 # for the randomize_kstack_offset feature. Dis !! 784 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 875 KBUILD_CFLAGS += $(call cc-option, -fno-stac !! 785 $(call cc-option,-fno-var-tracking) 876 << 877 # Clear used registers at func exit (to reduce << 878 ifdef CONFIG_ZERO_CALL_USED_REGS << 879 KBUILD_CFLAGS += -fzero-call-used-regs=used- << 880 endif 786 endif 881 787 882 ifdef CONFIG_FUNCTION_TRACER 788 ifdef CONFIG_FUNCTION_TRACER 883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC !! 789 ifndef CC_FLAGS_FTRACE 884 CC_FLAGS_FTRACE += -mrecord-mcount !! 790 CC_FLAGS_FTRACE := -pg 885 ifdef CONFIG_HAVE_NOP_MCOUNT << 886 ifeq ($(call cc-option-yn, -mnop-mcount),y << 887 CC_FLAGS_FTRACE += -mnop-mcount << 888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU << 889 endif << 890 endif << 891 endif << 892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL << 893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT << 894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU << 895 endif << 896 endif << 897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT << 898 ifdef CONFIG_HAVE_C_RECORDMCOUNT << 899 BUILD_C_RECORDMCOUNT := y << 900 export BUILD_C_RECORDMCOUNT << 901 endif << 902 endif 791 endif >> 792 export CC_FLAGS_FTRACE 903 ifdef CONFIG_HAVE_FENTRY 793 ifdef CONFIG_HAVE_FENTRY 904 # s390-linux-gnu-gcc did not support -mfentr !! 794 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 905 ifeq ($(call cc-option-yn, -mfentry),y) !! 795 endif 906 CC_FLAGS_FTRACE += -mfentry !! 796 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 907 CC_FLAGS_USING += -DCC_USING_FENTRY !! 797 KBUILD_AFLAGS += $(CC_USING_FENTRY) 908 endif !! 798 ifdef CONFIG_DYNAMIC_FTRACE >> 799 ifdef CONFIG_HAVE_C_RECORDMCOUNT >> 800 BUILD_C_RECORDMCOUNT := y >> 801 export BUILD_C_RECORDMCOUNT >> 802 endif 909 endif 803 endif 910 export CC_FLAGS_FTRACE << 911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA << 912 KBUILD_AFLAGS += $(CC_FLAGS_USING) << 913 endif 804 endif 914 805 915 # We trigger additional mismatches with less i 806 # We trigger additional mismatches with less inlining 916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 807 ifdef CONFIG_DEBUG_SECTION_MISMATCH 917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 808 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 918 endif 809 endif 919 810 920 # `rustc`'s `-Zfunction-sections` applies to d << 921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 811 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f !! 812 KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections !! 813 KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 924 LDFLAGS_vmlinux += --gc-sections << 925 endif 814 endif 926 815 927 ifdef CONFIG_SHADOW_CALL_STACK !! 816 # arch Makefile may override CC so keep this after arch Makefile is included 928 ifndef CONFIG_DYNAMIC_SCS !! 817 NOSTDINC_FLAGS += -nostdinc -isystem $(call shell-cached,$(CC) -print-file-name=include) 929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac !! 818 CHECKFLAGS += $(NOSTDINC_FLAGS) 930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) << 931 endif << 932 export CC_FLAGS_SCS << 933 endif << 934 819 935 ifdef CONFIG_LTO_CLANG !! 820 # warn about C99 declaration after statement 936 ifdef CONFIG_LTO_CLANG_THIN !! 821 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit << 938 else << 939 CC_FLAGS_LTO := -flto << 940 endif << 941 CC_FLAGS_LTO += -fvisibility=hidden << 942 822 943 # Limit inlining across translation units to r !! 823 # disable pointer signed / unsigned warnings in gcc 4.0 944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 824 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 945 endif << 946 825 947 ifdef CONFIG_LTO !! 826 # disable invalid "can't wrap" optimizations for signed / pointers 948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) !! 827 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 949 KBUILD_AFLAGS += -fno-lto << 950 export CC_FLAGS_LTO << 951 endif << 952 828 953 ifdef CONFIG_CFI_CLANG !! 829 # clang sets -fmerge-all-constants by default as optimization, but this 954 CC_FLAGS_CFI := -fsanitize=kcfi !! 830 # is non-conforming behavior for C and in fact breaks the kernel, so we 955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) !! 831 # need to disable it here generally. 956 export CC_FLAGS_CFI !! 832 KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 957 endif !! 833 >> 834 # for gcc -fno-merge-all-constants disables everything, but it is fine >> 835 # to have actual conforming behavior enabled. >> 836 KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 958 837 959 # Architectures can define flags to add/remove !! 838 # Make sure -fstack-check isn't enabled (like gentoo apparently did) 960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 839 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 961 export CC_FLAGS_FPU << 962 export CC_FLAGS_NO_FPU << 963 840 964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) !! 841 # conserve stack if available 965 # Set the minimal function alignment. Use the !! 842 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 966 # -fmin-function-alignment if it is available, << 967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT << 969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 970 else << 971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 972 endif << 973 endif << 974 843 975 # arch Makefile may override CC so keep this a !! 844 # disallow errors like 'EXPORT_GPL(foo);' with missing header 976 NOSTDINC_FLAGS += -nostdinc !! 845 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 977 846 978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 847 # require functions to have arguments in prototypes, not empty 'int foo()' 979 # the kernel uses only C99 flexible arrays for !! 848 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 980 # arrays. Enforce this for everything that may << 981 # perform bounds checking. << 982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl << 983 << 984 #Currently, disable -Wstringop-overflow for GC << 985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW << 986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + << 987 849 988 # disable invalid "can't wrap" optimizations f !! 850 # Prohibit date/time macros, which would make the build non-deterministic 989 KBUILD_CFLAGS += -fno-strict-overflow !! 851 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 990 852 991 # Make sure -fstack-check isn't enabled (like !! 853 # enforce correct pointer usage 992 KBUILD_CFLAGS += -fno-stack-check !! 854 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 993 855 994 # conserve stack if available !! 856 # Require designated initializers for all marked structures 995 ifdef CONFIG_CC_IS_GCC !! 857 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 996 KBUILD_CFLAGS += -fconserve-stack << 997 endif << 998 858 999 # change __FILE__ to the relative path from th !! 859 # use the deterministic mode of AR if available 1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 860 KBUILD_ARFLAGS := $(call ar-option,D) 1001 861 1002 # include additional Makefiles when needed !! 862 include scripts/Makefile.kasan 1003 include-y := scripts/Ma !! 863 include scripts/Makefile.extrawarn 1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma !! 864 include scripts/Makefile.ubsan 1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma << 1006 include-$(CONFIG_KASAN) += scripts/Ma << 1007 include-$(CONFIG_KCSAN) += scripts/Ma << 1008 include-$(CONFIG_KMSAN) += scripts/Ma << 1009 include-$(CONFIG_UBSAN) += scripts/Ma << 1010 include-$(CONFIG_KCOV) += scripts/Ma << 1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma << 1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma << 1013 << 1014 include $(addprefix $(srctree)/, $(include-y) << 1015 << 1016 # scripts/Makefile.gcc-plugins is intentional << 1017 # Do not add $(call cc-option,...) below this << 1018 # from the clean source tree, the GCC plugins << 1019 << 1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS << 1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) << 1022 KBUILD_AFLAGS += $(KAFLAGS) << 1023 KBUILD_CFLAGS += $(KCFLAGS) << 1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) << 1025 << 1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 << 1027 LDFLAGS_vmlinux += --build-id=sha1 << 1028 << 1029 KBUILD_LDFLAGS += -z noexecstack << 1030 ifeq ($(CONFIG_LD_IS_BFD),y) << 1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn << 1032 endif << 1033 865 1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) !! 866 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 1035 LDFLAGS_vmlinux += -X !! 867 # last assignments 1036 endif !! 868 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) >> 869 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) >> 870 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 1037 871 1038 ifeq ($(CONFIG_RELR),y) !! 872 # Use --build-id when available. 1039 # ld.lld before 15 did not support -z pack-re !! 873 LDFLAGS_BUILD_ID := $(call ld-option, --build-id) 1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy !! 874 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 1041 endif !! 875 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 1042 876 1043 # We never want expected sections to be place !! 877 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 1044 # linker. All sections should be explicitly n !! 878 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 1045 ifdef CONFIG_LD_ORPHAN_WARN << 1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG << 1047 endif 879 endif 1048 880 1049 # Align the bit size of userspace programs wi !! 881 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta !! 882 LDFLAGS_vmlinux += $(call ld-option, -X,) 1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta !! 883 endif 1052 << 1053 # make the checker run with the right archite << 1054 CHECKFLAGS += --arch=$(ARCH) << 1055 << 1056 # insure the checker run with the right endia << 1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- << 1058 << 1059 # the checker needs the correct machine size << 1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) << 1061 884 1062 # Default kernel image to build when no speci 885 # Default kernel image to build when no specific target is given. 1063 # KBUILD_IMAGE may be overruled on the comman 886 # KBUILD_IMAGE may be overruled on the command line or 1064 # set in the environment 887 # set in the environment 1065 # Also any assignments in arch/$(ARCH)/Makefi 888 # Also any assignments in arch/$(ARCH)/Makefile take precedence over 1066 # this default value 889 # this default value 1067 export KBUILD_IMAGE ?= vmlinux 890 export KBUILD_IMAGE ?= vmlinux 1068 891 1069 # 892 # 1070 # INSTALL_PATH specifies where to place the u 893 # INSTALL_PATH specifies where to place the updated kernel and system map 1071 # images. Default is /boot, but you can set i 894 # images. Default is /boot, but you can set it to other values 1072 export INSTALL_PATH ?= /boot 895 export INSTALL_PATH ?= /boot 1073 896 1074 # 897 # 1075 # INSTALL_DTBS_PATH specifies a prefix for re 898 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1076 # Like INSTALL_MOD_PATH, it isn't defined in 899 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1077 # an argument if needed. Otherwise it default 900 # an argument if needed. Otherwise it defaults to the kernel install path 1078 # 901 # 1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 902 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1080 903 1081 # 904 # 1082 # INSTALL_MOD_PATH specifies a prefix to MODL 905 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 1083 # relocations required by build roots. This 906 # relocations required by build roots. This is not defined in the 1084 # makefile but the argument can be passed to 907 # makefile but the argument can be passed to make if needed. 1085 # 908 # 1086 909 1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 910 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 1088 export MODLIB 911 export MODLIB 1089 912 1090 PHONY += prepare0 !! 913 # 1091 !! 914 # INSTALL_MOD_STRIP, if defined, will cause modules to be 1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 915 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 1093 export MODORDER := $(extmod_prefix)modules.or !! 916 # the default option --strip-debug will be used. Otherwise, 1094 export MODULES_NSDEPS := $(extmod_prefix)modu !! 917 # INSTALL_MOD_STRIP value will be used as the options to the strip command. 1095 !! 918 1096 ifeq ($(KBUILD_EXTMOD),) !! 919 ifdef INSTALL_MOD_STRIP >> 920 ifeq ($(INSTALL_MOD_STRIP),1) >> 921 mod_strip_cmd = $(STRIP) --strip-debug >> 922 else >> 923 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) >> 924 endif # INSTALL_MOD_STRIP=1 >> 925 else >> 926 mod_strip_cmd = true >> 927 endif # INSTALL_MOD_STRIP >> 928 export mod_strip_cmd >> 929 >> 930 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed >> 931 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP >> 932 # or CONFIG_MODULE_COMPRESS_XZ. >> 933 >> 934 mod_compress_cmd = true >> 935 ifdef CONFIG_MODULE_COMPRESS >> 936 ifdef CONFIG_MODULE_COMPRESS_GZIP >> 937 mod_compress_cmd = gzip -n -f >> 938 endif # CONFIG_MODULE_COMPRESS_GZIP >> 939 ifdef CONFIG_MODULE_COMPRESS_XZ >> 940 mod_compress_cmd = xz -f >> 941 endif # CONFIG_MODULE_COMPRESS_XZ >> 942 endif # CONFIG_MODULE_COMPRESS >> 943 export mod_compress_cmd >> 944 >> 945 # Select initial ramdisk compression format, default is gzip(1). >> 946 # This shall be used by the dracut(8) tool while creating an initramfs image. >> 947 # >> 948 INITRD_COMPRESS-y := gzip >> 949 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 >> 950 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma >> 951 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz >> 952 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo >> 953 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 >> 954 # do not export INITRD_COMPRESS, since we didn't actually >> 955 # choose a sane default compression above. >> 956 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 1097 957 1098 build-dir := . !! 958 ifdef CONFIG_MODULE_SIG_ALL 1099 clean-dirs := $(sort . Documentation \ !! 959 $(eval $(call config_filename,MODULE_SIG_KEY)) 1100 $(patsubst %/,%,$(filter << 1101 $(drivers-) $(libs-)) << 1102 << 1103 export ARCH_CORE := $(core-y) << 1104 export ARCH_LIB := $(filter %/, $(lib << 1105 export ARCH_DRIVERS := $(drivers-y) $(dri << 1106 # Externally visible symbols (used by link-vm << 1107 960 1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 961 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 1109 ifdef CONFIG_MODULES << 1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a << 1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib << 1112 else 962 else 1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 963 mod_sign_cmd = true 1114 endif 964 endif >> 965 export mod_sign_cmd 1115 966 1116 export KBUILD_VMLINUX_LIBS !! 967 ifdef CONFIG_STACK_VALIDATION 1117 export KBUILD_LDS := arch/$(SRCARCH) !! 968 has_libelf := $(call try-run,\ >> 969 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) >> 970 ifeq ($(has_libelf),1) >> 971 objtool_target := tools/objtool FORCE >> 972 else >> 973 ifdef CONFIG_UNWINDER_ORC >> 974 $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") >> 975 else >> 976 $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") >> 977 endif >> 978 SKIP_STACK_VALIDATION := 1 >> 979 export SKIP_STACK_VALIDATION >> 980 endif >> 981 endif >> 982 >> 983 >> 984 ifeq ($(KBUILD_EXTMOD),) >> 985 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1118 986 >> 987 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ >> 988 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ >> 989 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) >> 990 >> 991 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ >> 992 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) >> 993 >> 994 init-y := $(patsubst %/, %/built-in.o, $(init-y)) >> 995 core-y := $(patsubst %/, %/built-in.o, $(core-y)) >> 996 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) >> 997 net-y := $(patsubst %/, %/built-in.o, $(net-y)) >> 998 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) >> 999 libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y))) >> 1000 virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) >> 1001 >> 1002 # Externally visible symbols (used by link-vmlinux.sh) >> 1003 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) >> 1004 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) >> 1005 export KBUILD_VMLINUX_LIBS := $(libs-y1) >> 1006 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds >> 1007 export LDFLAGS_vmlinux >> 1008 # used by scripts/package/Makefile >> 1009 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) >> 1010 >> 1011 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) >> 1012 >> 1013 # Include targets which we want to execute sequentially if the rest of the >> 1014 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be >> 1015 # evaluated more than once. >> 1016 PHONY += vmlinux_prereq >> 1017 vmlinux_prereq: $(vmlinux-deps) FORCE >> 1018 ifdef CONFIG_HEADERS_CHECK >> 1019 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check >> 1020 endif >> 1021 ifdef CONFIG_GDB_SCRIPTS >> 1022 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) >> 1023 endif 1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1024 ifdef CONFIG_TRIM_UNUSED_KSYMS 1120 # For the kernel to actually contain only the !! 1025 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1121 # we have to build modules as well to determi !! 1026 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1122 KBUILD_MODULES := 1 << 1123 endif 1027 endif 1124 1028 1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1029 # standalone target for easier testing 1126 quiet_cmd_ar_vmlinux.a = AR $@ !! 1030 include/generated/autoksyms.h: FORCE 1127 cmd_ar_vmlinux.a = \ !! 1031 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 1128 rm -f $@; \ << 1129 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 1130 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 1131 << 1132 targets += vmlinux.a << 1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 1134 $(call if_changed,ar_vmlinux.a) << 1135 << 1136 PHONY += vmlinux_o << 1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) << 1138 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1139 1032 1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1033 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1141 @: !! 1034 >> 1035 # Final link of vmlinux with optional arch pass after final link >> 1036 cmd_link-vmlinux = \ >> 1037 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ >> 1038 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1142 1039 1143 PHONY += vmlinux !! 1040 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1041 +$(call if_changed,link-vmlinux) 1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1042 1146 # unrelated; the decompressors just happen to !! 1043 # Build samples along the rest of the kernel 1147 # arch/*/boot/compressed/vmlinux. !! 1044 ifdef CONFIG_SAMPLES 1148 # Export LDFLAGS_vmlinux only to scripts/Make !! 1045 vmlinux-dirs += samples 1149 # !! 1046 endif 1150 # _LDFLAGS_vmlinux is a workaround for the 'p << 1151 # https://savannah.gnu.org/bugs/?61463 << 1152 # For Make > 4.4, the following simple code w << 1153 # vmlinux: private export LDFLAGS_vmlinux := << 1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost << 1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1158 1047 1159 # The actual objects are generated when desce 1048 # The actual objects are generated when descending, 1160 # make sure no implicit rule kicks in 1049 # make sure no implicit rule kicks in 1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1050 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1162 1051 1163 ifeq ($(origin KERNELRELEASE),file) !! 1052 # Handle descending into subdirectories listed in $(vmlinux-dirs) 1164 filechk_kernel.release = $(srctree)/scripts/s !! 1053 # Preset locale variables to speed up the build process. Limit locale 1165 else !! 1054 # tweaks to this spot to avoid wrong language settings when running 1166 filechk_kernel.release = echo $(KERNELRELEASE !! 1055 # make menuconfig etc. 1167 endif !! 1056 # Error messages still appears in the original language >> 1057 >> 1058 PHONY += $(vmlinux-dirs) >> 1059 $(vmlinux-dirs): prepare scripts >> 1060 $(Q)$(MAKE) $(build)=$@ need-builtin=1 >> 1061 >> 1062 define filechk_kernel.release >> 1063 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" >> 1064 endef 1168 1065 1169 # Store (new) KERNELRELEASE string in include 1066 # Store (new) KERNELRELEASE string in include/config/kernel.release 1170 include/config/kernel.release: FORCE !! 1067 include/config/kernel.release: include/config/auto.conf FORCE 1171 $(call filechk,kernel.release) 1068 $(call filechk,kernel.release) 1172 1069 1173 # Additional helpers built in scripts/ << 1174 # Carefully list dependencies so we do not tr << 1175 # in parallel << 1176 PHONY += scripts << 1177 scripts: scripts_basic scripts_dtc << 1178 $(Q)$(MAKE) $(build)=$(@) << 1179 1070 1180 # Things we need to do before we recursively 1071 # Things we need to do before we recursively start building the kernel 1181 # or the modules are listed in "prepare". 1072 # or the modules are listed in "prepare". 1182 # A multi level approach is used. prepareN is 1073 # A multi level approach is used. prepareN is processed before prepareN-1. 1183 # archprepare is used in arch Makefiles and w 1074 # archprepare is used in arch Makefiles and when processed asm symlink, 1184 # version.h and scripts_basic is processed / 1075 # version.h and scripts_basic is processed / created. 1185 1076 1186 PHONY += prepare archprepare !! 1077 # Listed in dependency order >> 1078 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 1187 1079 1188 archprepare: outputmakefile archheaders archs !! 1080 # prepare3 is used to check if we are building in a separate output directory, 1189 asm-generic $(version_h) include/gene !! 1081 # and if so do: 1190 include/generated/compile.h include/g !! 1082 # 1) Check that make has not been executed in the kernel src $(srctree) 1191 !! 1083 prepare3: include/config/kernel.release 1192 prepare0: archprepare !! 1084 ifneq ($(KBUILD_SRC),) 1193 $(Q)$(MAKE) $(build)=scripts/mod !! 1085 @$(kecho) ' Using $(srctree) as source for kernel' 1194 $(Q)$(MAKE) $(build)=. prepare !! 1086 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ >> 1087 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ >> 1088 echo >&2 " in the '$(srctree)' directory.";\ >> 1089 /bin/false; \ >> 1090 fi; >> 1091 endif >> 1092 >> 1093 # prepare2 creates a makefile if using a separate output directory. >> 1094 # From this point forward, .config has been reprocessed, so any rules >> 1095 # that need to depend on updated CONFIG_* values can be checked here. >> 1096 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic >> 1097 >> 1098 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ >> 1099 include/config/auto.conf >> 1100 $(cmd_crmodverdir) 1195 1101 1196 # All the preparing.. !! 1102 archprepare: archheaders archscripts prepare1 scripts_basic 1197 prepare: prepare0 << 1198 ifdef CONFIG_RUST << 1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 1200 $(Q)$(MAKE) $(build)=rust << 1201 endif << 1202 1103 1203 PHONY += remove-stale-files !! 1104 prepare0: archprepare gcc-plugins 1204 remove-stale-files: !! 1105 $(Q)$(MAKE) $(build)=. 1205 $(Q)$(srctree)/scripts/remove-stale-f << 1206 1106 1207 # Support for using generic headers in asm-ge !! 1107 # All the preparing.. 1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1108 prepare: prepare0 prepare-objtool 1209 1109 >> 1110 # Support for using generic headers in asm-generic 1210 PHONY += asm-generic uapi-asm-generic 1111 PHONY += asm-generic uapi-asm-generic 1211 asm-generic: uapi-asm-generic 1112 asm-generic: uapi-asm-generic 1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1113 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 1213 generic=include/asm-generic !! 1114 src=asm obj=arch/$(SRCARCH)/include/generated/asm 1214 uapi-asm-generic: 1115 uapi-asm-generic: 1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1116 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 1216 generic=include/uapi/asm-generic !! 1117 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm >> 1118 >> 1119 PHONY += prepare-objtool >> 1120 prepare-objtool: $(objtool_target) >> 1121 >> 1122 # Check for CONFIG flags that require compiler support. Abort the build >> 1123 # after .config has been processed, but before the kernel build starts. >> 1124 # >> 1125 # For security-sensitive CONFIG options, we don't want to fallback and/or >> 1126 # silently change which compiler flags will be used, since that leads to >> 1127 # producing kernels with different security feature characteristics >> 1128 # depending on the compiler used. (For example, "But I selected >> 1129 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") >> 1130 PHONY += prepare-compiler-check >> 1131 prepare-compiler-check: FORCE >> 1132 # Make sure compiler supports requested stack protector flag. >> 1133 ifdef stackp-name >> 1134 # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option. >> 1135 ifeq ($(stackp-flag),) >> 1136 @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ >> 1137 Compiler does not support any known stack-protector >&2 >> 1138 else >> 1139 # Fail if specifically requested stack protector is missing. >> 1140 ifeq ($(call cc-option, $(stackp-flag)),) >> 1141 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ >> 1142 $(stackp-flag) not supported by compiler >&2 && exit 1 >> 1143 endif >> 1144 endif >> 1145 endif >> 1146 # Make sure compiler does not have buggy stack-protector support. If a >> 1147 # specific stack-protector was requested, fail the build, otherwise warn. >> 1148 ifdef stackp-broken >> 1149 ifeq ($(stackp-name),AUTO) >> 1150 @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ >> 1151 $(stackp-flag) available but compiler is broken: disabling >&2 >> 1152 else >> 1153 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ >> 1154 $(stackp-flag) available but compiler is broken >&2 && exit 1 >> 1155 endif >> 1156 endif >> 1157 @: 1217 1158 1218 # Generate some files 1159 # Generate some files 1219 # ------------------------------------------- 1160 # --------------------------------------------------------------------------- 1220 1161 1221 # KERNELRELEASE can change from a few differe 1162 # KERNELRELEASE can change from a few different places, meaning version.h 1222 # needs to be updated, so this check is force 1163 # needs to be updated, so this check is forced on all builds 1223 1164 1224 uts_len := 64 1165 uts_len := 64 1225 define filechk_utsrelease.h 1166 define filechk_utsrelease.h 1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1167 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1227 echo '"$(KERNELRELEASE)" exceeds $( 1168 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1228 exit 1; 1169 exit 1; \ 1229 fi; 1170 fi; \ 1230 echo \#define UTS_RELEASE \"$(KERNELR !! 1171 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1231 endef 1172 endef 1232 1173 1233 define filechk_version.h 1174 define filechk_version.h 1234 if [ $(SUBLEVEL) -gt 255 ]; then !! 1175 (echo \#define LINUX_VERSION_CODE $(shell \ 1235 echo \#define LINUX_VERSION_C !! 1176 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1236 expr $(VERSION) \* 65536 + $( !! 1177 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1237 else << 1238 echo \#define LINUX_VERSION_C << 1239 expr $(VERSION) \* 65536 + $( << 1240 fi; << 1241 echo '#define KERNEL_VERSION(a,b,c) ( << 1242 ((c) > 255 ? 255 : (c)))'; << 1243 echo \#define LINUX_VERSION_MAJOR $(V << 1244 echo \#define LINUX_VERSION_PATCHLEVE << 1245 echo \#define LINUX_VERSION_SUBLEVEL << 1246 endef 1178 endef 1247 1179 1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1180 $(version_h): $(srctree)/Makefile FORCE 1249 $(version_h): private SUBLEVEL := $(or $(SUBL << 1250 $(version_h): FORCE << 1251 $(call filechk,version.h) 1181 $(call filechk,version.h) >> 1182 $(Q)rm -f $(old_version_h) 1252 1183 1253 include/generated/utsrelease.h: include/confi 1184 include/generated/utsrelease.h: include/config/kernel.release FORCE 1254 $(call filechk,utsrelease.h) 1185 $(call filechk,utsrelease.h) 1255 1186 1256 filechk_compile.h = $(srctree)/scripts/mkcomp << 1257 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 1258 << 1259 include/generated/compile.h: FORCE << 1260 $(call filechk,compile.h) << 1261 << 1262 PHONY += headerdep 1187 PHONY += headerdep 1263 headerdep: 1188 headerdep: 1264 $(Q)find $(srctree)/include/ -name '* 1189 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1265 $(srctree)/scripts/headerdep.pl -I$(s 1190 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1266 1191 1267 # ------------------------------------------- 1192 # --------------------------------------------------------------------------- 1268 # Kernel headers 1193 # Kernel headers 1269 1194 1270 #Default location for installed headers 1195 #Default location for installed headers 1271 export INSTALL_HDR_PATH = $(objtree)/usr 1196 export INSTALL_HDR_PATH = $(objtree)/usr 1272 1197 1273 quiet_cmd_headers_install = INSTALL $(INSTALL !! 1198 # If we do an all arch process set dst to include/arch-$(SRCARCH) 1274 cmd_headers_install = \ !! 1199 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) 1275 mkdir -p $(INSTALL_HDR_PATH); \ << 1276 rsync -mrl --include='*/' --include=' << 1277 usr/include $(INSTALL_HDR_PATH) << 1278 << 1279 PHONY += headers_install << 1280 headers_install: headers << 1281 $(call cmd,headers_install) << 1282 << 1283 PHONY += archheaders archscripts << 1284 << 1285 hdr-inst := -f $(srctree)/scripts/Makefile.he << 1286 << 1287 PHONY += headers << 1288 headers: $(version_h) scripts_unifdef uapi-as << 1289 $(if $(filter um, $(SRCARCH)), $(erro << 1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi << 1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC << 1292 << 1293 ifdef CONFIG_HEADERS_INSTALL << 1294 prepare: headers << 1295 endif << 1296 << 1297 PHONY += scripts_unifdef << 1298 scripts_unifdef: scripts_basic << 1299 $(Q)$(MAKE) $(build)=scripts scripts/ << 1300 1200 1301 # ------------------------------------------- !! 1201 PHONY += archheaders 1302 # Install !! 1202 archheaders: 1303 << 1304 # Many distributions have the custom install << 1305 # If DKMS is installed, 'make install' will e << 1306 # to this Makefile to build and install exter << 1307 # Cancel sub_make_done so that options such a << 1308 1203 1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) !! 1204 PHONY += archscripts 1310 cmd_install = unset sub_make_done; $(sr !! 1205 archscripts: 1311 1206 1312 # ------------------------------------------- !! 1207 PHONY += __headers 1313 # vDSO install !! 1208 __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts >> 1209 $(Q)$(MAKE) $(build)=scripts build_unifdef >> 1210 >> 1211 PHONY += headers_install_all >> 1212 headers_install_all: >> 1213 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1314 1214 1315 PHONY += vdso_install !! 1215 PHONY += headers_install 1316 vdso_install: export INSTALL_FILES = $(vdso-i !! 1216 headers_install: __headers 1317 vdso_install: !! 1217 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1218 $(error Headers not exportable for the $(SRCARCH) architecture)) 1319 !! 1219 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include 1320 # ------------------------------------------- !! 1220 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) 1321 # Tools !! 1221 1322 !! 1222 PHONY += headers_check_all 1323 ifdef CONFIG_OBJTOOL !! 1223 headers_check_all: headers_install_all 1324 prepare: tools/objtool !! 1224 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1325 endif !! 1225 1326 !! 1226 PHONY += headers_check 1327 ifdef CONFIG_BPF !! 1227 headers_check: headers_install 1328 ifdef CONFIG_DEBUG_INFO_BTF !! 1228 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 1329 prepare: tools/bpf/resolve_btfids !! 1229 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 1330 endif << 1331 endif << 1332 << 1333 # The tools build system is not a part of Kbu << 1334 # its own unique issues. If you need to integ << 1335 # please consider locating that tool outside << 1336 # standard Kbuild "hostprogs" syntax instead << 1337 # here. See Documentation/kbuild/makefiles.rs << 1338 << 1339 PHONY += resolve_btfids_clean << 1340 << 1341 resolve_btfids_O = $(abspath $(objtree))/tool << 1342 << 1343 # tools/bpf/resolve_btfids directory might no << 1344 # in output directory, skip its clean in that << 1345 resolve_btfids_clean: << 1346 ifneq ($(wildcard $(resolve_btfids_O)),) << 1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ << 1348 endif << 1349 << 1350 # Clear a bunch of variables before executing << 1351 ifeq ($(quiet),silent_) << 1352 tools_silent=s << 1353 endif << 1354 << 1355 tools/: FORCE << 1356 $(Q)mkdir -p $(objtree)/tools << 1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 1358 << 1359 tools/%: FORCE << 1360 $(Q)mkdir -p $(objtree)/tools << 1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 1362 1230 1363 # ------------------------------------------- 1231 # --------------------------------------------------------------------------- 1364 # Kernel selftest 1232 # Kernel selftest 1365 1233 1366 PHONY += kselftest 1234 PHONY += kselftest 1367 kselftest: headers !! 1235 kselftest: 1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1236 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1369 1237 1370 kselftest-%: headers FORCE !! 1238 PHONY += kselftest-clean 1371 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1239 kselftest-clean: >> 1240 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1372 1241 1373 PHONY += kselftest-merge 1242 PHONY += kselftest-merge 1374 kselftest-merge: 1243 kselftest-merge: 1375 $(if $(wildcard $(objtree)/.config),, 1244 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1376 $(Q)find $(srctree)/tools/testing/sel !! 1245 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1377 xargs $(srctree)/scripts/kcon !! 1246 -m $(objtree)/.config \ 1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 1247 $(srctree)/tools/testing/selftests/*/config >> 1248 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1379 1249 1380 # ------------------------------------------- 1250 # --------------------------------------------------------------------------- 1381 # Devicetree files !! 1251 # Modules 1382 << 1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ << 1384 dtstree := arch/$(SRCARCH)/boot/dts << 1385 endif << 1386 << 1387 ifneq ($(dtstree),) << 1388 << 1389 %.dtb: dtbs_prepare << 1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 1391 << 1392 %.dtbo: dtbs_prepare << 1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 1394 1252 1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1253 ifdef CONFIG_MODULES 1396 dtbs: dtbs_prepare << 1397 $(Q)$(MAKE) $(build)=$(dtstree) need- << 1398 1254 1399 # include/config/kernel.release is actually n !! 1255 # By default, build modules as well 1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 1401 # dtbs_install depend on it as dtbs_install m << 1402 dtbs_prepare: include/config/kernel.release s << 1403 1256 1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), !! 1257 all: modules 1405 export CHECK_DTBS=y << 1406 endif << 1407 1258 1408 ifneq ($(CHECK_DTBS),) !! 1259 # Build modules 1409 dtbs_prepare: dt_binding_schemas !! 1260 # 1410 endif !! 1261 # A module can be listed more than once in obj-m resulting in >> 1262 # duplicate lines in modules.order files. Those are removed >> 1263 # using awk while concatenating to the final file. >> 1264 >> 1265 PHONY += modules >> 1266 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin >> 1267 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order >> 1268 @$(kecho) ' Building modules, stage 2.'; >> 1269 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1411 1270 1412 dtbs_check: dtbs !! 1271 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) >> 1272 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1413 1273 1414 dtbs_install: !! 1274 %/modules.builtin: include/config/auto.conf 1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1275 $(Q)$(MAKE) $(modbuiltin)=$* 1416 1276 1417 ifdef CONFIG_OF_EARLY_FLATTREE << 1418 all: dtbs << 1419 endif << 1420 1277 1421 endif !! 1278 # Target to prepare building external modules >> 1279 PHONY += modules_prepare >> 1280 modules_prepare: prepare scripts 1422 1281 1423 PHONY += scripts_dtc !! 1282 # Target to install modules 1424 scripts_dtc: scripts_basic !! 1283 PHONY += modules_install 1425 $(Q)$(MAKE) $(build)=scripts/dtc !! 1284 modules_install: _modinst_ _modinst_post >> 1285 >> 1286 PHONY += _modinst_ >> 1287 _modinst_: >> 1288 @rm -rf $(MODLIB)/kernel >> 1289 @rm -f $(MODLIB)/source >> 1290 @mkdir -p $(MODLIB)/kernel >> 1291 @ln -s $(abspath $(srctree)) $(MODLIB)/source >> 1292 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ >> 1293 rm -f $(MODLIB)/build ; \ >> 1294 ln -s $(CURDIR) $(MODLIB)/build ; \ >> 1295 fi >> 1296 @cp -f $(objtree)/modules.order $(MODLIB)/ >> 1297 @cp -f $(objtree)/modules.builtin $(MODLIB)/ >> 1298 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst >> 1299 >> 1300 # This depmod is only for convenience to give the initial >> 1301 # boot a modules.dep even before / is mounted read-write. However the >> 1302 # boot script depmod is the master version. >> 1303 PHONY += _modinst_post >> 1304 _modinst_post: _modinst_ >> 1305 $(call cmd,depmod) 1426 1306 1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1307 ifeq ($(CONFIG_MODULE_SIG), y) 1428 export CHECK_DTBS=y !! 1308 PHONY += modules_sign >> 1309 modules_sign: >> 1310 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1429 endif 1311 endif 1430 1312 1431 PHONY += dt_binding_check dt_binding_schemas !! 1313 else # CONFIG_MODULES 1432 dt_binding_check: dt_binding_schemas scripts_ << 1433 $(Q)$(MAKE) $(build)=Documentation/de << 1434 << 1435 dt_binding_schemas: << 1436 $(Q)$(MAKE) $(build)=Documentation/de << 1437 << 1438 PHONY += dt_compatible_check << 1439 dt_compatible_check: dt_binding_schemas << 1440 $(Q)$(MAKE) $(build)=Documentation/de << 1441 1314 >> 1315 # Modules not configured 1442 # ------------------------------------------- 1316 # --------------------------------------------------------------------------- 1443 # Modules << 1444 << 1445 ifdef CONFIG_MODULES << 1446 << 1447 # By default, build modules as well << 1448 << 1449 all: modules << 1450 << 1451 # When we're building modules with modversion << 1452 # the built-in objects during the descend as << 1453 # make sure the checksums are up to date befo << 1454 ifdef CONFIG_MODVERSIONS << 1455 KBUILD_BUILTIN := 1 << 1456 endif << 1457 << 1458 # Build modules << 1459 # << 1460 << 1461 # *.ko are usually independent of vmlinux, bu << 1462 # is an exception. << 1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES << 1464 KBUILD_BUILTIN := 1 << 1465 modules: vmlinux << 1466 endif << 1467 1317 1468 modules: modules_prepare !! 1318 PHONY += modules modules_install 1469 !! 1319 modules modules_install: 1470 # Target to prepare building external modules !! 1320 @echo >&2 1471 modules_prepare: prepare !! 1321 @echo >&2 "The present kernel configuration has modules disabled." 1472 $(Q)$(MAKE) $(build)=scripts scripts/ !! 1322 @echo >&2 "Type 'make config' and enable loadable module support." >> 1323 @echo >&2 "Then build a kernel with module support enabled." >> 1324 @echo >&2 >> 1325 @exit 1 1473 1326 1474 endif # CONFIG_MODULES 1327 endif # CONFIG_MODULES 1475 1328 1476 ### 1329 ### 1477 # Cleaning is done on three levels. 1330 # Cleaning is done on three levels. 1478 # make clean Delete most generated files 1331 # make clean Delete most generated files 1479 # Leave enough to build extern 1332 # Leave enough to build external modules 1480 # make mrproper Delete the current configura 1333 # make mrproper Delete the current configuration, and all generated files 1481 # make distclean Remove editor backup files, 1334 # make distclean Remove editor backup files, patch leftover files and the like 1482 1335 1483 # Directories & files removed with 'make clea 1336 # Directories & files removed with 'make clean' 1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1337 CLEAN_DIRS += $(MODVERDIR) 1485 modules.builtin modules.builti << 1486 compile_commands.json rust/tes << 1487 rust-project.json .vmlinux.obj << 1488 1338 1489 # Directories & files removed with 'make mrpr 1339 # Directories & files removed with 'make mrproper' 1490 MRPROPER_FILES += include/config include/gene !! 1340 MRPROPER_DIRS += include/config usr/include include/generated \ 1491 arch/$(SRCARCH)/include/gen !! 1341 arch/*/include/generated .tmp_objdiff 1492 debian snap tar-install PKG !! 1342 MRPROPER_FILES += .config .config.old .version \ 1493 .config .config.old .versio !! 1343 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1494 Module.symvers \ !! 1344 signing_key.pem signing_key.priv signing_key.x509 \ 1495 certs/signing_key.pem \ !! 1345 x509.genkey extra_certificates signing_key.x509.keyid \ 1496 certs/x509.genkey \ !! 1346 signing_key.x509.signer vmlinux-gdb.py 1497 vmlinux-gdb.py \ << 1498 rpmbuild \ << 1499 rust/libmacros.so << 1500 1347 1501 # clean - Delete most, but leave enough to bu 1348 # clean - Delete most, but leave enough to build external modules 1502 # 1349 # 1503 clean: private rm-files := $(CLEAN_FILES) !! 1350 clean: rm-dirs := $(CLEAN_DIRS) >> 1351 clean: rm-files := $(CLEAN_FILES) >> 1352 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1504 1353 1505 PHONY += archclean vmlinuxclean !! 1354 PHONY += $(clean-dirs) clean archclean vmlinuxclean >> 1355 $(clean-dirs): >> 1356 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1506 1357 1507 vmlinuxclean: 1358 vmlinuxclean: 1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1359 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1360 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1510 1361 1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1362 clean: archclean vmlinuxclean 1512 1363 1513 # mrproper - Delete all generated files, incl 1364 # mrproper - Delete all generated files, including .config 1514 # 1365 # 1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1366 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) >> 1367 mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1516 mrproper-dirs := $(addprefix _mrproper_, 1368 mrproper-dirs := $(addprefix _mrproper_,scripts) 1517 1369 1518 PHONY += $(mrproper-dirs) mrproper !! 1370 PHONY += $(mrproper-dirs) mrproper archmrproper 1519 $(mrproper-dirs): 1371 $(mrproper-dirs): 1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1372 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1521 1373 1522 mrproper: clean $(mrproper-dirs) !! 1374 mrproper: clean archmrproper $(mrproper-dirs) >> 1375 $(call cmd,rmdirs) 1523 $(call cmd,rmfiles) 1376 $(call cmd,rmfiles) 1524 @find . $(RCS_FIND_IGNORE) \ << 1525 \( -name '*.rmeta' \) \ << 1526 -type f -print | xargs rm -f << 1527 1377 1528 # distclean 1378 # distclean 1529 # 1379 # 1530 PHONY += distclean 1380 PHONY += distclean 1531 1381 1532 distclean: mrproper 1382 distclean: mrproper 1533 @find . $(RCS_FIND_IGNORE) \ !! 1383 @find $(srctree) $(RCS_FIND_IGNORE) \ 1534 \( -name '*.orig' -o -name '* 1384 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1535 -o -name '*.bak' -o -name '#* 1385 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1536 -o -name 'core' -o -name tags !! 1386 -o -name 'core' \) \ 1537 -o -name GPATH -o -name GRTAG << 1538 -type f -print | xargs rm -f 1387 -type f -print | xargs rm -f 1539 1388 1540 1389 1541 # Packaging of the kernel to various formats 1390 # Packaging of the kernel to various formats 1542 # ------------------------------------------- 1391 # --------------------------------------------------------------------------- >> 1392 # rpm target kept for backward compatibility >> 1393 package-dir := scripts/package 1543 1394 1544 %src-pkg: FORCE 1395 %src-pkg: FORCE 1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1396 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1546 %pkg: include/config/kernel.release FORCE 1397 %pkg: include/config/kernel.release FORCE 1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1398 $(Q)$(MAKE) $(build)=$(package-dir) $@ >> 1399 rpm: rpm-pkg >> 1400 @echo " WARNING: \"rpm\" target will be removed after Linux 4.18" >> 1401 @echo " Please use \"rpm-pkg\" instead." >> 1402 1548 1403 1549 # Brief documentation of the typical targets 1404 # Brief documentation of the typical targets used 1550 # ------------------------------------------- 1405 # --------------------------------------------------------------------------- 1551 1406 1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1407 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1553 boards := $(sort $(notdir $(boards))) 1408 boards := $(sort $(notdir $(boards))) 1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1409 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1410 board-dirs := $(sort $(notdir $(board-dirs:/=))) 1556 1411 1557 PHONY += help 1412 PHONY += help 1558 help: 1413 help: 1559 @echo 'Cleaning targets:' 1414 @echo 'Cleaning targets:' 1560 @echo ' clean - Remove mo 1415 @echo ' clean - Remove most generated files but keep the config and' 1561 @echo ' enough bu 1416 @echo ' enough build support to build external modules' 1562 @echo ' mrproper - Remove al 1417 @echo ' mrproper - Remove all generated files + config + various backup files' 1563 @echo ' distclean - mrproper 1418 @echo ' distclean - mrproper + remove editor backup and patch files' 1564 @echo '' 1419 @echo '' >> 1420 @echo 'Configuration targets:' 1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1421 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1566 @echo '' 1422 @echo '' 1567 @echo 'Other generic targets:' 1423 @echo 'Other generic targets:' 1568 @echo ' all - Build all 1424 @echo ' all - Build all targets marked with [*]' 1569 @echo '* vmlinux - Build the 1425 @echo '* vmlinux - Build the bare kernel' 1570 @echo '* modules - Build all 1426 @echo '* modules - Build all modules' 1571 @echo ' modules_install - Install a 1427 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1572 @echo ' vdso_install - Install u << 1573 @echo ' dir/ - Build all 1428 @echo ' dir/ - Build all files in dir and below' 1574 @echo ' dir/file.[ois] - Build spe 1429 @echo ' dir/file.[ois] - Build specified target only' 1575 @echo ' dir/file.ll - Build the 1430 @echo ' dir/file.ll - Build the LLVM assembly file' 1576 @echo ' (requires 1431 @echo ' (requires compiler support for LLVM assembly generation)' 1577 @echo ' dir/file.lst - Build spe 1432 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1578 @echo ' (requires 1433 @echo ' (requires a recent binutils and recent build (System.map))' 1579 @echo ' dir/file.ko - Build mod 1434 @echo ' dir/file.ko - Build module including final link' 1580 @echo ' modules_prepare - Set up fo 1435 @echo ' modules_prepare - Set up for building external modules' 1581 @echo ' tags/TAGS - Generate 1436 @echo ' tags/TAGS - Generate tags file for editors' 1582 @echo ' cscope - Generate 1437 @echo ' cscope - Generate cscope index' 1583 @echo ' gtags - Generate 1438 @echo ' gtags - Generate GNU GLOBAL index' 1584 @echo ' kernelrelease - Output th 1439 @echo ' kernelrelease - Output the release version string (use with make -s)' 1585 @echo ' kernelversion - Output th 1440 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1586 @echo ' image_name - Output th 1441 @echo ' image_name - Output the image name (use with make -s)' 1587 @echo ' headers_install - Install s 1442 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1588 echo ' (default: 1443 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1589 echo '' 1444 echo '' 1590 @echo 'Static analysers:' 1445 @echo 'Static analysers:' 1591 @echo ' checkstack - Generate !! 1446 @echo ' checkstack - Generate a list of stack hogs' 1592 @echo ' with a st !! 1447 @echo ' namespacecheck - Name space analysis on compiled kernel' 1593 @echo ' versioncheck - Sanity ch 1448 @echo ' versioncheck - Sanity check on version.h usage' 1594 @echo ' includecheck - Check for 1449 @echo ' includecheck - Check for duplicate included header files' 1595 @echo ' export_report - List the 1450 @echo ' export_report - List the usages of all exported symbols' >> 1451 @echo ' headers_check - Sanity check on exported headers' 1596 @echo ' headerdep - Detect in 1452 @echo ' headerdep - Detect inclusion cycles in headers' 1597 @echo ' coccicheck - Check wit 1453 @echo ' coccicheck - Check with Coccinelle' 1598 @echo ' clang-analyzer - Check wit << 1599 @echo ' clang-tidy - Check wit << 1600 @echo '' << 1601 @echo 'Tools:' << 1602 @echo ' nsdeps - Generate << 1603 @echo '' 1454 @echo '' 1604 @echo 'Kernel selftest:' 1455 @echo 'Kernel selftest:' 1605 @echo ' kselftest - Build a !! 1456 @echo ' kselftest - Build and run kernel selftest (run as root)' 1606 @echo ' Build, !! 1457 @echo ' Build, install, and boot kernel before' 1607 @echo ' running !! 1458 @echo ' running kselftest on it' 1608 @echo ' Run as !! 1459 @echo ' kselftest-clean - Remove all generated kselftest files' 1609 @echo ' kselftest-all - Build k !! 1460 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1610 @echo ' kselftest-install - Build a !! 1461 @echo ' .config.' 1611 @echo ' kselftest-clean - Remove << 1612 @echo ' kselftest-merge - Merge a << 1613 @echo ' kselfte << 1614 @echo '' << 1615 @echo 'Rust targets:' << 1616 @echo ' rustavailable - Checks wh << 1617 @echo ' available << 1618 @echo ' rustfmt - Reformat << 1619 @echo ' rustfmtcheck - Checks if << 1620 @echo ' is format << 1621 @echo ' rustdoc - Generate << 1622 @echo ' (requires << 1623 @echo ' rusttest - Runs the << 1624 @echo ' (requires << 1625 @echo ' rust-analyzer - Generate << 1626 @echo ' (requires << 1627 @echo ' dir/file.[os] - Build spe << 1628 @echo ' dir/file.rsi - Build mac << 1629 @echo ' Run with << 1630 @echo ' The outpu << 1631 @echo ' dir/file.ll - Build the << 1632 @echo '' 1462 @echo '' 1633 @$(if $(dtstree), \ << 1634 echo 'Devicetree:'; \ << 1635 echo '* dtbs - << 1636 echo ' dtbs_install - << 1637 echo ' dt_binding_check - << 1638 echo ' dt_binding_schema - << 1639 echo ' dtbs_check - << 1640 echo '') << 1641 << 1642 @echo 'Userspace tools targets:' 1463 @echo 'Userspace tools targets:' 1643 @echo ' use "make tools/help"' 1464 @echo ' use "make tools/help"' 1644 @echo ' or "cd tools; make help"' 1465 @echo ' or "cd tools; make help"' 1645 @echo '' 1466 @echo '' 1646 @echo 'Kernel packaging:' 1467 @echo 'Kernel packaging:' 1647 @$(MAKE) -f $(srctree)/scripts/Makefi !! 1468 @$(MAKE) $(build)=$(package-dir) help 1648 @echo '' 1469 @echo '' 1649 @echo 'Documentation targets:' 1470 @echo 'Documentation targets:' 1650 @$(MAKE) -f $(srctree)/Documentation/ 1471 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1651 @echo '' 1472 @echo '' 1652 @echo 'Architecture-specific targets !! 1473 @echo 'Architecture specific targets ($(SRCARCH)):' 1653 @$(or $(archhelp),\ !! 1474 @$(if $(archhelp),$(archhelp),\ 1654 echo ' No architecture-speci !! 1475 echo ' No architecture specific help defined for $(SRCARCH)') 1655 @echo '' 1476 @echo '' 1656 @$(if $(boards), \ 1477 @$(if $(boards), \ 1657 $(foreach b, $(boards), \ 1478 $(foreach b, $(boards), \ 1658 printf " %-27s - Build for % !! 1479 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1659 echo '') 1480 echo '') 1660 @$(if $(board-dirs), \ 1481 @$(if $(board-dirs), \ 1661 $(foreach b, $(board-dirs), \ 1482 $(foreach b, $(board-dirs), \ 1662 printf " %-16s - Show %s-spe 1483 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1663 printf " %-16s - Show all of 1484 printf " %-16s - Show all of the above\\n" help-boards; \ 1664 echo '') 1485 echo '') 1665 1486 1666 @echo ' make V=n [targets] 1: ver !! 1487 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1667 @echo ' 2: giv !! 1488 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1668 @echo ' V=1 an << 1669 @echo ' make O=dir [targets] Locate 1489 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1670 @echo ' make C=1 [targets] Check !! 1490 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1671 @echo ' (spars << 1672 @echo ' make C=2 [targets] Force 1491 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1492 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1674 @echo ' make W=n [targets] Enable !! 1493 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1675 @echo ' 1: warnings w 1494 @echo ' 1: warnings which may be relevant and do not occur too often' 1676 @echo ' 2: warnings w 1495 @echo ' 2: warnings which occur quite often but may still be relevant' 1677 @echo ' 3: more obscu 1496 @echo ' 3: more obscure warnings, can most likely be ignored' 1678 @echo ' c: extra chec << 1679 @echo ' e: warnings a << 1680 @echo ' Multiple leve 1497 @echo ' Multiple levels can be combined with W=12 or W=123' 1681 @$(if $(dtstree), \ << 1682 echo ' make CHECK_DTBS=1 [ta << 1683 echo ' This can be ap << 1684 ) << 1685 @echo '' 1498 @echo '' 1686 @echo 'Execute "make" or "make all" 1499 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1687 @echo 'For further info see the ./RE 1500 @echo 'For further info see the ./README file' 1688 1501 1689 1502 1690 help-board-dirs := $(addprefix help-,$(board- 1503 help-board-dirs := $(addprefix help-,$(board-dirs)) 1691 1504 1692 help-boards: $(help-board-dirs) 1505 help-boards: $(help-board-dirs) 1693 1506 1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1507 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1695 1508 1696 $(help-board-dirs): help-%: 1509 $(help-board-dirs): help-%: 1697 @echo 'Architecture-specific targets !! 1510 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1698 @$(if $(boards-per-dir), \ 1511 @$(if $(boards-per-dir), \ 1699 $(foreach b, $(boards-per-dir 1512 $(foreach b, $(boards-per-dir), \ 1700 printf " %-24s - Build for % 1513 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1701 echo '') 1514 echo '') 1702 1515 1703 1516 1704 # Documentation targets 1517 # Documentation targets 1705 # ------------------------------------------- 1518 # --------------------------------------------------------------------------- 1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1519 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1707 linkcheckdocs dochelp refcheck !! 1520 linkcheckdocs dochelp refcheckdocs 1708 PHONY += $(DOC_TARGETS) 1521 PHONY += $(DOC_TARGETS) 1709 $(DOC_TARGETS): !! 1522 $(DOC_TARGETS): scripts_basic FORCE 1710 $(Q)$(MAKE) $(build)=Documentation $@ 1523 $(Q)$(MAKE) $(build)=Documentation $@ 1711 1524 1712 << 1713 # Rust targets << 1714 # ------------------------------------------- << 1715 << 1716 # "Is Rust available?" target << 1717 PHONY += rustavailable << 1718 rustavailable: << 1719 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 1720 << 1721 # Documentation target << 1722 # << 1723 # Using the singular to avoid running afoul o << 1724 PHONY += rustdoc << 1725 rustdoc: prepare << 1726 $(Q)$(MAKE) $(build)=rust $@ << 1727 << 1728 # Testing target << 1729 PHONY += rusttest << 1730 rusttest: prepare << 1731 $(Q)$(MAKE) $(build)=rust $@ << 1732 << 1733 # Formatting targets << 1734 PHONY += rustfmt rustfmtcheck << 1735 << 1736 # We skip `rust/alloc` since we want to minim << 1737 # << 1738 # We match using absolute paths since `find` << 1739 # when matching, which is a problem when e.g. << 1740 # We `grep` afterwards in order to remove the << 1741 rustfmt: << 1742 $(Q)find $(abs_srctree) -type f -name << 1743 -o -path $(abs_srctree)/rust/ << 1744 -o -path $(abs_objtree)/rust/ << 1745 | grep -Fv $(abs_srctree)/rus << 1746 | grep -Fv $(abs_objtree)/rus << 1747 | grep -Fv generated \ << 1748 | xargs $(RUSTFMT) $(rustfmt_ << 1749 << 1750 rustfmtcheck: rustfmt_flags = --check << 1751 rustfmtcheck: rustfmt << 1752 << 1753 # Misc << 1754 # ------------------------------------------- << 1755 << 1756 PHONY += misc-check << 1757 misc-check: << 1758 $(Q)$(srctree)/scripts/misc-check << 1759 << 1760 all: misc-check << 1761 << 1762 PHONY += scripts_gdb << 1763 scripts_gdb: prepare0 << 1764 $(Q)$(MAKE) $(build)=scripts/gdb << 1765 $(Q)ln -fsn $(abspath $(srctree)/scri << 1766 << 1767 ifdef CONFIG_GDB_SCRIPTS << 1768 all: scripts_gdb << 1769 endif << 1770 << 1771 else # KBUILD_EXTMOD 1525 else # KBUILD_EXTMOD 1772 1526 1773 filechk_kernel.release = echo $(KERNELRELEASE << 1774 << 1775 ### 1527 ### 1776 # External module support. 1528 # External module support. 1777 # When building external modules the kernel u 1529 # When building external modules the kernel used as basis is considered 1778 # read-only, and no consistency checks are ma 1530 # read-only, and no consistency checks are made and the make 1779 # system is not used on the basis kernel. If 1531 # system is not used on the basis kernel. If updates are required 1780 # in the basis kernel ordinary make commands !! 1532 # in the basis kernel ordinary make commands (without M=...) must >> 1533 # be used. >> 1534 # >> 1535 # The following are the only valid targets when building external >> 1536 # modules. >> 1537 # make M=dir clean Delete all automatically generated files >> 1538 # make M=dir modules Make all modules in specified dir >> 1539 # make M=dir Same as 'make M=dir modules' >> 1540 # make M=dir modules_install >> 1541 # Install the modules built in the module directory >> 1542 # Assumes install directory is already created 1781 1543 1782 # We are always building only modules. !! 1544 # We are always building modules 1783 KBUILD_BUILTIN := << 1784 KBUILD_MODULES := 1 1545 KBUILD_MODULES := 1 >> 1546 PHONY += crmodverdir >> 1547 crmodverdir: >> 1548 $(cmd_crmodverdir) >> 1549 >> 1550 PHONY += $(objtree)/Module.symvers >> 1551 $(objtree)/Module.symvers: >> 1552 @test -e $(objtree)/Module.symvers || ( \ >> 1553 echo; \ >> 1554 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ >> 1555 echo " is missing; modules will have no dependencies and modversions."; \ >> 1556 echo ) >> 1557 >> 1558 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) >> 1559 PHONY += $(module-dirs) modules >> 1560 $(module-dirs): crmodverdir $(objtree)/Module.symvers >> 1561 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1785 1562 1786 build-dir := $(KBUILD_EXTMOD) !! 1563 modules: $(module-dirs) >> 1564 @$(kecho) ' Building modules, stage 2.'; >> 1565 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1787 1566 1788 compile_commands.json: $(extmod_prefix)compil !! 1567 PHONY += modules_install 1789 PHONY += compile_commands.json !! 1568 modules_install: _emodinst_ _emodinst_post 1790 1569 1791 clean-dirs := $(KBUILD_EXTMOD) !! 1570 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1571 PHONY += _emodinst_ 1793 $(KBUILD_EXTMOD)/compile_commands.jso !! 1572 _emodinst_: 1794 !! 1573 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1795 PHONY += prepare !! 1574 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1796 # now expand this into a simple variable to r !! 1575 1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1576 PHONY += _emodinst_post 1798 prepare: !! 1577 _emodinst_post: _emodinst_ 1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1578 $(call cmd,depmod) 1800 echo >&2 "warning: the compil !! 1579 1801 echo >&2 " The kernel was bu !! 1580 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1802 echo >&2 " You are using: !! 1581 1803 fi !! 1582 PHONY += $(clean-dirs) clean >> 1583 $(clean-dirs): >> 1584 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) >> 1585 >> 1586 clean: rm-dirs := $(MODVERDIR) >> 1587 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1804 1588 1805 PHONY += help 1589 PHONY += help 1806 help: 1590 help: 1807 @echo ' Building external modules.' 1591 @echo ' Building external modules.' 1808 @echo ' Syntax: make -C path/to/ker 1592 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1809 @echo '' 1593 @echo '' 1810 @echo ' modules - default t 1594 @echo ' modules - default target, build the module(s)' 1811 @echo ' modules_install - install t 1595 @echo ' modules_install - install the module' 1812 @echo ' clean - remove ge 1596 @echo ' clean - remove generated files in module directory only' 1813 @echo ' rust-analyzer - generate << 1814 @echo '' 1597 @echo '' 1815 1598 1816 ifndef CONFIG_MODULES !! 1599 # Dummies... 1817 modules modules_install: __external_modules_e !! 1600 PHONY += prepare scripts 1818 __external_modules_error: !! 1601 prepare: ; 1819 @echo >&2 '***' !! 1602 scripts: ; 1820 @echo >&2 '*** The present kernel dis << 1821 @echo >&2 '*** You cannot build or in << 1822 @echo >&2 '***' << 1823 @false << 1824 endif << 1825 << 1826 endif # KBUILD_EXTMOD 1603 endif # KBUILD_EXTMOD 1827 1604 1828 # ------------------------------------------- << 1829 # Modules << 1830 << 1831 PHONY += modules modules_install modules_sign << 1832 << 1833 modules_install: << 1834 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1835 sign-only=$(if $(filter modules_insta << 1836 << 1837 ifeq ($(CONFIG_MODULE_SIG),y) << 1838 # modules_sign is a subset of modules_install << 1839 # 'make modules_install modules_sign' is equi << 1840 modules_sign: modules_install << 1841 @: << 1842 else << 1843 modules_sign: << 1844 @echo >&2 '***' << 1845 @echo >&2 '*** CONFIG_MODULE_SIG is d << 1846 @echo >&2 '***' << 1847 @false << 1848 endif << 1849 << 1850 ifdef CONFIG_MODULES << 1851 << 1852 $(MODORDER): $(build-dir) << 1853 @: << 1854 << 1855 # KBUILD_MODPOST_NOFINAL can be set to skip t << 1856 # This is solely useful to speed up test comp << 1857 modules: modpost << 1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1) << 1859 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1860 endif << 1861 << 1862 PHONY += modules_check << 1863 modules_check: $(MODORDER) << 1864 $(Q)$(CONFIG_SHELL) $(srctree)/script << 1865 << 1866 else # CONFIG_MODULES << 1867 << 1868 modules: << 1869 @: << 1870 << 1871 KBUILD_MODULES := << 1872 << 1873 endif # CONFIG_MODULES << 1874 << 1875 PHONY += modpost << 1876 modpost: $(if $(single-build),, $(if $(KBUILD << 1877 $(if $(KBUILD_MODULES), modules_chec << 1878 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1879 << 1880 # Single targets << 1881 # ------------------------------------------- << 1882 # To build individual files in subdirectories << 1883 # << 1884 # make foo/bar/baz.s << 1885 # << 1886 # The supported suffixes for single-target ar << 1887 # << 1888 # To build only under specific subdirectories << 1889 # << 1890 # make foo/bar/baz/ << 1891 << 1892 ifdef single-build << 1893 << 1894 # .ko is special because modpost is needed << 1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG << 1896 single-no-ko := $(filter-out $(single-ko), $( << 1897 $(foreach x, o mod, $(patsubs << 1898 << 1899 $(single-ko): single_modules << 1900 @: << 1901 $(single-no-ko): $(build-dir) << 1902 @: << 1903 << 1904 # Remove MODORDER when done because it is not << 1905 PHONY += single_modules << 1906 single_modules: $(single-no-ko) modules_prepa << 1907 $(Q){ $(foreach m, $(single-ko), echo << 1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) << 1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1911 endif << 1912 $(Q)rm -f $(MODORDER) << 1913 << 1914 single-goals := $(addprefix $(build-dir)/, $( << 1915 << 1916 KBUILD_MODULES := 1 << 1917 << 1918 endif << 1919 << 1920 # Preset locale variables to speed up the bui << 1921 # tweaks to this spot to avoid wrong language << 1922 # make menuconfig etc. << 1923 # Error messages still appears in the origina << 1924 PHONY += $(build-dir) << 1925 $(build-dir): prepare << 1926 $(Q)$(MAKE) $(build)=$@ need-builtin= << 1927 << 1928 clean-dirs := $(addprefix _clean_, $(clean-di << 1929 PHONY += $(clean-dirs) clean << 1930 $(clean-dirs): << 1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea << 1932 << 1933 clean: $(clean-dirs) 1605 clean: $(clean-dirs) >> 1606 $(call cmd,rmdirs) 1934 $(call cmd,rmfiles) 1607 $(call cmd,rmfiles) 1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1608 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1936 \( -name '*.[aios]' -o -name !! 1609 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1937 -o -name '*.ko.*' \ !! 1610 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ 1938 -o -name '*.dtb' -o -name '*. << 1939 -o -name '*.dtb.S' -o -name ' << 1940 -o -name '*.dt.yaml' -o -name << 1941 -o -name '*.dwo' -o -name '*. 1611 -o -name '*.dwo' -o -name '*.lst' \ 1942 -o -name '*.su' -o -name '*.m !! 1612 -o -name '*.su' \ 1943 -o -name '.*.d' -o -name '.*. 1613 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1944 -o -name '*.lex.c' -o -name ' << 1945 -o -name '*.asn1.[ch]' \ << 1946 -o -name '*.symtypes' -o -nam 1614 -o -name '*.symtypes' -o -name 'modules.order' \ >> 1615 -o -name modules.builtin -o -name '.tmp_*.o.*' \ >> 1616 -o -name .cache.mk \ 1947 -o -name '*.c.[012]*.*' \ 1617 -o -name '*.c.[012]*.*' \ 1948 -o -name '*.ll' \ 1618 -o -name '*.ll' \ 1949 -o -name '*.gcno' \ !! 1619 -o -name '*.gcno' \) -type f -print | xargs rm -f 1950 -o -name '*.*.symversions' \) << 1951 -o -name '.tmp_*' -print \ << 1952 | xargs rm -rf << 1953 1620 1954 # Generate tags for editors 1621 # Generate tags for editors 1955 # ------------------------------------------- 1622 # --------------------------------------------------------------------------- 1956 quiet_cmd_tags = GEN $@ 1623 quiet_cmd_tags = GEN $@ 1957 cmd_tags = $(BASH) $(srctree)/scripts/t !! 1624 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1958 1625 1959 tags TAGS cscope gtags: FORCE 1626 tags TAGS cscope gtags: FORCE 1960 $(call cmd,tags) 1627 $(call cmd,tags) 1961 1628 1962 # Generate rust-project.json (a file that des << 1963 # Rust projects) for rust-analyzer (an implem << 1964 # Protocol). << 1965 PHONY += rust-analyzer << 1966 rust-analyzer: << 1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 1968 $(Q)$(MAKE) $(build)=rust $@ << 1969 << 1970 # Script to generate missing namespace depend << 1971 # ------------------------------------------- << 1972 << 1973 PHONY += nsdeps << 1974 nsdeps: export KBUILD_NSDEPS=1 << 1975 nsdeps: modules << 1976 $(Q)$(CONFIG_SHELL) $(srctree)/script << 1977 << 1978 # Clang Tooling << 1979 # ------------------------------------------- << 1980 << 1981 quiet_cmd_gen_compile_commands = GEN $@ << 1982 cmd_gen_compile_commands = $(PYTHON3) $ << 1983 << 1984 $(extmod_prefix)compile_commands.json: $(srct << 1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K << 1986 $(if $(CONFIG_MODULES), $(MODORDER)) << 1987 $(call if_changed,gen_compile_command << 1988 << 1989 targets += $(extmod_prefix)compile_commands.j << 1990 << 1991 PHONY += clang-tidy clang-analyzer << 1992 << 1993 ifdef CONFIG_CC_IS_CLANG << 1994 quiet_cmd_clang_tools = CHECK $< << 1995 cmd_clang_tools = $(PYTHON3) $(srctree) << 1996 << 1997 clang-tidy clang-analyzer: $(extmod_prefix)co << 1998 $(call cmd,clang_tools) << 1999 else << 2000 clang-tidy clang-analyzer: << 2001 @echo "$@ requires CC=clang" >&2 << 2002 @false << 2003 endif << 2004 << 2005 # Scripts to check various things for consist 1629 # Scripts to check various things for consistency 2006 # ------------------------------------------- 1630 # --------------------------------------------------------------------------- 2007 1631 2008 PHONY += includecheck versioncheck coccicheck !! 1632 PHONY += includecheck versioncheck coccicheck namespacecheck export_report 2009 1633 2010 includecheck: 1634 includecheck: 2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1635 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2012 -name '*.[hcS]' -type f -prin 1636 -name '*.[hcS]' -type f -print | sort \ 2013 | xargs $(PERL) -w $(srctree) 1637 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 2014 1638 2015 versioncheck: 1639 versioncheck: 2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1640 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2017 -name '*.[hcS]' -type f -prin 1641 -name '*.[hcS]' -type f -print | sort \ 2018 | xargs $(PERL) -w $(srctree) 1642 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 2019 1643 2020 coccicheck: 1644 coccicheck: 2021 $(Q)$(BASH) $(srctree)/scripts/$@ !! 1645 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ >> 1646 >> 1647 namespacecheck: >> 1648 $(PERL) $(srctree)/scripts/namespace.pl 2022 1649 2023 export_report: 1650 export_report: 2024 $(PERL) $(srctree)/scripts/export_rep 1651 $(PERL) $(srctree)/scripts/export_report.pl 2025 1652 >> 1653 endif #ifeq ($(config-targets),1) >> 1654 endif #ifeq ($(mixed-targets),1) >> 1655 2026 PHONY += checkstack kernelrelease kernelversi 1656 PHONY += checkstack kernelrelease kernelversion image_name 2027 1657 2028 # UML needs a little special treatment here. 1658 # UML needs a little special treatment here. It wants to use the host 2029 # toolchain, so needs $(SUBARCH) passed to ch 1659 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2030 # else wants $(ARCH), including people doing 1660 # else wants $(ARCH), including people doing cross-builds, which means 2031 # that $(SUBARCH) doesn't work here. 1661 # that $(SUBARCH) doesn't work here. 2032 ifeq ($(ARCH), um) 1662 ifeq ($(ARCH), um) 2033 CHECKSTACK_ARCH := $(SUBARCH) 1663 CHECKSTACK_ARCH := $(SUBARCH) 2034 else 1664 else 2035 CHECKSTACK_ARCH := $(ARCH) 1665 CHECKSTACK_ARCH := $(ARCH) 2036 endif 1666 endif 2037 MINSTACKSIZE ?= 100 << 2038 checkstack: 1667 checkstack: 2039 $(OBJDUMP) -d vmlinux $$(find . -name 1668 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 2040 $(PERL) $(srctree)/scripts/checkstack !! 1669 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 2041 1670 2042 kernelrelease: 1671 kernelrelease: 2043 @$(filechk_kernel.release) !! 1672 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 2044 1673 2045 kernelversion: 1674 kernelversion: 2046 @echo $(KERNELVERSION) 1675 @echo $(KERNELVERSION) 2047 1676 2048 image_name: 1677 image_name: 2049 @echo $(KBUILD_IMAGE) 1678 @echo $(KBUILD_IMAGE) 2050 1679 2051 PHONY += run-command !! 1680 # Clear a bunch of variables before executing the submake 2052 run-command: !! 1681 tools/: FORCE 2053 $(Q)$(KBUILD_RUN_COMMAND) !! 1682 $(Q)mkdir -p $(objtree)/tools >> 1683 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ >> 1684 >> 1685 tools/%: FORCE >> 1686 $(Q)mkdir -p $(objtree)/tools >> 1687 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* >> 1688 >> 1689 # Single targets >> 1690 # --------------------------------------------------------------------------- >> 1691 # Single targets are compatible with: >> 1692 # - build with mixed source and output >> 1693 # - build with separate output dir 'make O=...' >> 1694 # - external modules >> 1695 # >> 1696 # target-dir => where to store outputfile >> 1697 # build-dir => directory in kernel source tree to use >> 1698 >> 1699 ifeq ($(KBUILD_EXTMOD),) >> 1700 build-dir = $(patsubst %/,%,$(dir $@)) >> 1701 target-dir = $(dir $@) >> 1702 else >> 1703 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) >> 1704 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) >> 1705 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) >> 1706 endif >> 1707 >> 1708 %.s: %.c prepare scripts FORCE >> 1709 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1710 %.i: %.c prepare scripts FORCE >> 1711 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1712 %.o: %.c prepare scripts FORCE >> 1713 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1714 %.lst: %.c prepare scripts FORCE >> 1715 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1716 %.s: %.S prepare scripts FORCE >> 1717 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1718 %.o: %.S prepare scripts FORCE >> 1719 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1720 %.symtypes: %.c prepare scripts FORCE >> 1721 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1722 %.ll: %.c prepare scripts FORCE >> 1723 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) >> 1724 >> 1725 # Modules >> 1726 /: prepare scripts FORCE >> 1727 $(cmd_crmodverdir) >> 1728 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ >> 1729 $(build)=$(build-dir) >> 1730 # Make sure the latest headers are built for Documentation >> 1731 Documentation/ samples/: headers_install >> 1732 %/: prepare scripts FORCE >> 1733 $(cmd_crmodverdir) >> 1734 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ >> 1735 $(build)=$(build-dir) >> 1736 %.ko: prepare scripts FORCE >> 1737 $(cmd_crmodverdir) >> 1738 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ >> 1739 $(build)=$(build-dir) $(@:.ko=.o) >> 1740 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost >> 1741 >> 1742 # FIXME Should go into a make.lib or something >> 1743 # =========================================================================== >> 1744 >> 1745 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) >> 1746 cmd_rmdirs = rm -rf $(rm-dirs) 2054 1747 2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1748 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 2056 cmd_rmfiles = rm -rf $(rm-files) !! 1749 cmd_rmfiles = rm -f $(rm-files) 2057 1750 2058 # read saved command lines for existing targe !! 1751 # Run depmod only if we have System.map and depmod is executable 2059 existing-targets := $(wildcard $(sort $(targe !! 1752 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) >> 1753 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ >> 1754 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 2060 1755 2061 -include $(foreach f,$(existing-targets),$(di !! 1756 # Create temporary dir for module support files >> 1757 # clean it up only when building all modules >> 1758 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ >> 1759 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) >> 1760 >> 1761 # read all saved command lines >> 1762 >> 1763 cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) >> 1764 >> 1765 ifneq ($(cmd_files),) >> 1766 $(cmd_files): ; # Do not try to update included dependency files >> 1767 include $(cmd_files) >> 1768 endif 2062 1769 2063 endif # config-build !! 1770 endif # skip-makefile 2064 endif # mixed-build << 2065 endif # need-sub-make << 2066 1771 2067 PHONY += FORCE 1772 PHONY += FORCE 2068 FORCE: 1773 FORCE: 2069 1774 2070 # Declare the contents of the PHONY variable !! 1775 # Declare the contents of the .PHONY variable as phony. We keep that 2071 # information in a variable so we can use it 1776 # information in a variable so we can use it in if_changed and friends. 2072 .PHONY: $(PHONY) 1777 .PHONY: $(PHONY)
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